diff --git a/etc/message.xml b/etc/message.xml
index ebbb4e57a96fafd0407f74861500e67daf1916cf..7c4a927cc5e7997b7533e98ec4d2143c60f19b87 100644
--- a/etc/message.xml
+++ b/etc/message.xml
@@ -442,6 +442,14 @@
           <boolean>true</boolean>
         </map>
 
+        <key>SimConsoleResponse</key>
+        <map>
+          <key>flavor</key>
+          <string>llsd</string>
+          <key>trusted-sender</key>
+          <boolean>true</boolean>
+        </map>
+
         <key>DirLandReply</key>
         <map>
           <key>flavor</key>
diff --git a/indra/llui/lllineeditor.cpp b/indra/llui/lllineeditor.cpp
index 5f5fe851bb8c819349299954986c02c0ecbc9883..3eb58e1aec1b8e80b3abe9d0242dd7a083709c0e 100644
--- a/indra/llui/lllineeditor.cpp
+++ b/indra/llui/lllineeditor.cpp
@@ -1304,7 +1304,7 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 
 	// handle ctrl-uparrow if we have a history enabled line editor.
 	case KEY_UP:
-		if( mHaveHistory && ( MASK_CONTROL == mask ) )
+		if( mHaveHistory && ((mIgnoreArrowKeys == false) || ( MASK_CONTROL == mask )) )
 		{
 			if( mCurrentHistoryLine > mLineHistory.begin() )
 			{
@@ -1319,9 +1319,9 @@ BOOL LLLineEditor::handleSpecialKey(KEY key, MASK mask)
 		}
 		break;
 
-	// handle ctrl-downarrow if we have a history enabled line editor
+	// handle [ctrl]-downarrow if we have a history enabled line editor
 	case KEY_DOWN:
-		if( mHaveHistory  && ( MASK_CONTROL == mask ) )
+		if( mHaveHistory  && ((mIgnoreArrowKeys == false) || ( MASK_CONTROL == mask )) )
 		{
 			if( !mLineHistory.empty() && mCurrentHistoryLine < mLineHistory.end() - 1 )
 			{
diff --git a/indra/llui/lltextbase.cpp b/indra/llui/lltextbase.cpp
index 5721df6b3627c24281c164d6bb30b087d55175eb..3f213ed13e331e2050ad95d51e26155538a00179 100644
--- a/indra/llui/lltextbase.cpp
+++ b/indra/llui/lltextbase.cpp
@@ -1591,7 +1591,10 @@ void LLTextBase::setText(const LLStringExplicit &utf8str, const LLStyle::Params&
 	// appendText modifies mCursorPos...
 	appendText(text, false, input_params);
 	// ...so move cursor to top after appending text
-	startOfDoc();
+	if (!mTrackEnd)
+	{
+		startOfDoc();
+	}
 
 	onValueChange(0, getLength());
 }
diff --git a/indra/newview/CMakeLists.txt b/indra/newview/CMakeLists.txt
index d44b0ce6799828aa5105d8cfce51d0991d1d4af4..3a4b9be0d7393c4def4188c5af5178130421798b 100644
--- a/indra/newview/CMakeLists.txt
+++ b/indra/newview/CMakeLists.txt
@@ -201,6 +201,7 @@ set(viewer_SOURCE_FILES
     llfloaterpostprocess.cpp
     llfloaterpreference.cpp
     llfloaterproperties.cpp
+    llfloaterregiondebugconsole.cpp
     llfloaterregioninfo.cpp
     llfloaterreporter.cpp
     llfloaterscriptdebug.cpp
@@ -733,6 +734,7 @@ set(viewer_HEADER_FILES
     llfloaterpostprocess.h
     llfloaterpreference.h
     llfloaterproperties.h
+    llfloaterregiondebugconsole.h
     llfloaterregioninfo.h
     llfloaterreporter.h
     llfloaterscriptdebug.h
diff --git a/indra/newview/llfloaterregiondebugconsole.cpp b/indra/newview/llfloaterregiondebugconsole.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b3b7645dd4f2f07f6576c809fc0ef10cd413eb59
--- /dev/null
+++ b/indra/newview/llfloaterregiondebugconsole.cpp
@@ -0,0 +1,227 @@
+/** 
+ * @file llfloaterregiondebugconsole.h
+ * @author Brad Kittenbrink <brad@lindenlab.com>
+ * @brief Quick and dirty console for region debug settings
+ *
+ * $LicenseInfo:firstyear=2010&license=viewergpl$
+ * 
+ * Copyright (c) 2010-2010, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llfloaterregiondebugconsole.h"
+
+#include "llagent.h"
+#include "llhttpclient.h"
+#include "llhttpnode.h"
+#include "lllineeditor.h"
+#include "lltexteditor.h"
+#include "llviewerregion.h"
+
+// Two versions of the sim console API are supported.
+//
+// SimConsole capability (deprecated):
+// This is the initial implementation that is supported by some versions of the
+// simulator. It is simple and straight forward, just POST a command and the
+// body of the response has the result. This API is deprecated because it
+// doesn't allow the sim to use any asynchronous API.
+//
+// SimConsoleAsync capability:
+// This capability replaces the original SimConsole capability. It is similar
+// in that the command is POSTed to the SimConsoleAsync cap, but the response
+// comes in through the event poll, which gives the simulator more flexibility
+// and allows it to perform complex operations without blocking any frames.
+//
+// We will assume the SimConsoleAsync capability is available, and fall back to
+// the SimConsole cap if it is not. The simulator will only support one or the
+// other.
+
+namespace
+{
+	// Signal used to notify the floater of responses from the asynchronous
+	// API.
+	typedef boost::signals2::signal<
+		void (const std::string& output)> console_reply_signal_t;
+	console_reply_signal_t sConsoleReplySignal;
+
+	const std::string PROMPT("\n\n> ");
+	const std::string UNABLE_TO_SEND_COMMAND(
+		"ERROR: The last command was not received by the server.");
+	const std::string CONSOLE_UNAVAILABLE(
+		"ERROR: No console available for this region/simulator.");
+	const std::string CONSOLE_NOT_SUPPORTED(
+		"This region does not support the simulator console.");
+
+	// This responder handles the initial response. Unless error() is called
+	// we assume that the simulator has received our request. Error will be
+	// called if this request times out.
+	class AsyncConsoleResponder : public LLHTTPClient::Responder
+	{
+	public:
+		/* virtual */
+		void error(U32 status, const std::string& reason)
+		{
+			sConsoleReplySignal(UNABLE_TO_SEND_COMMAND);
+		}
+	};
+
+	class ConsoleResponder : public LLHTTPClient::Responder
+	{
+	public:
+		ConsoleResponder(LLTextEditor *output) : mOutput(output)
+		{
+		}
+
+		/*virtual*/
+		void error(U32 status, const std::string& reason)
+		{
+			if (mOutput)
+			{
+				mOutput->appendText(
+					UNABLE_TO_SEND_COMMAND + PROMPT,
+					false);
+			}
+		}
+
+		/*virtual*/
+		void result(const LLSD& content)
+		{
+			if (mOutput)
+			{
+				mOutput->appendText(
+					content.asString() + PROMPT, false);
+			}
+		}
+
+		LLTextEditor * mOutput;
+	};
+
+	// This handles responses for console commands sent via the asynchronous
+	// API.
+	class ConsoleResponseNode : public LLHTTPNode
+	{
+	public:
+		/* virtual */
+		void post(
+			LLHTTPNode::ResponsePtr reponse,
+			const LLSD& context,
+			const LLSD& input) const
+		{
+			llinfos << "Received response from the debug console: "
+				<< input << llendl;
+			sConsoleReplySignal(input["body"].asString());
+		}
+	};
+}
+
+LLFloaterRegionDebugConsole::LLFloaterRegionDebugConsole(LLSD const & key)
+: LLFloater(key), mOutput(NULL)
+{
+	mReplySignalConnection = sConsoleReplySignal.connect(
+		boost::bind(
+			&LLFloaterRegionDebugConsole::onReplyReceived,
+			this,
+			_1));
+}
+
+LLFloaterRegionDebugConsole::~LLFloaterRegionDebugConsole()
+{
+	mReplySignalConnection.disconnect();
+}
+
+BOOL LLFloaterRegionDebugConsole::postBuild()
+{
+	LLLineEditor* input = getChild<LLLineEditor>("region_debug_console_input");
+	input->setEnableLineHistory(true);
+	input->setCommitCallback(boost::bind(&LLFloaterRegionDebugConsole::onInput, this, _1, _2));
+	input->setFocus(true);
+	input->setCommitOnFocusLost(false);
+
+	mOutput = getChild<LLTextEditor>("region_debug_console_output");
+
+	std::string url = gAgent.getRegion()->getCapability("SimConsoleAsync");
+	if (url.empty())
+	{
+		// Fall back to see if the old API is supported.
+		url = gAgent.getRegion()->getCapability("SimConsole");
+		if (url.empty())
+		{
+			mOutput->appendText(
+				CONSOLE_NOT_SUPPORTED + PROMPT,
+				false);
+			return TRUE;
+		}
+	}
+
+	mOutput->appendText("> ", false);
+	return TRUE;
+}
+
+void LLFloaterRegionDebugConsole::onInput(LLUICtrl* ctrl, const LLSD& param)
+{
+	LLLineEditor* input = static_cast<LLLineEditor*>(ctrl);
+	std::string text = input->getText() + "\n";
+
+	std::string url = gAgent.getRegion()->getCapability("SimConsoleAsync");
+	if (url.empty())
+	{
+		// Fall back to the old API
+		url = gAgent.getRegion()->getCapability("SimConsole");
+		if (url.empty())
+		{
+			text += CONSOLE_UNAVAILABLE + PROMPT;
+		}
+		else
+		{
+			// Using SimConsole (deprecated)
+			LLHTTPClient::post(
+				url,
+				LLSD(input->getText()),
+				new ConsoleResponder(mOutput));
+		}
+	}
+	else
+	{
+		// Using SimConsoleAsync
+		LLHTTPClient::post(
+			url,
+			LLSD(input->getText()),
+			new AsyncConsoleResponder);
+	}
+
+	mOutput->appendText(text, false);
+	input->clear();
+}
+
+void LLFloaterRegionDebugConsole::onReplyReceived(const std::string& output)
+{
+	mOutput->appendText(output + PROMPT, false);
+}
+
+LLHTTPRegistration<ConsoleResponseNode>
+	gHTTPRegistrationMessageDebugConsoleResponse(
+		"/message/SimConsoleResponse");
diff --git a/indra/newview/llfloaterregiondebugconsole.h b/indra/newview/llfloaterregiondebugconsole.h
new file mode 100644
index 0000000000000000000000000000000000000000..4171a4da6baf293c0475c410b7bd65f6288f2d13
--- /dev/null
+++ b/indra/newview/llfloaterregiondebugconsole.h
@@ -0,0 +1,63 @@
+/** 
+ * @file llfloaterregiondebugconsole.h
+ * @author Brad Kittenbrink <brad@lindenlab.com>
+ * @brief Quick and dirty console for region debug settings
+ *
+ * $LicenseInfo:firstyear=2010&license=viewergpl$
+ * 
+ * Copyright (c) 2010-2010, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLFLOATERREGIONDEBUGCONSOLE_H
+#define LL_LLFLOATERREGIONDEBUGCONSOLE_H
+
+#include <boost/signals2.hpp>
+
+#include "llfloater.h"
+#include "llhttpclient.h"
+
+class LLTextEditor;
+
+class LLFloaterRegionDebugConsole : public LLFloater, public LLHTTPClient::Responder
+{
+public:
+	LLFloaterRegionDebugConsole(LLSD const & key);
+	virtual ~LLFloaterRegionDebugConsole();
+
+	// virtual
+	BOOL postBuild();
+	
+	void onInput(LLUICtrl* ctrl, const LLSD& param);
+
+	LLTextEditor * mOutput;
+
+ private:
+	void onReplyReceived(const std::string& output);
+
+	boost::signals2::connection mReplySignalConnection;
+};
+
+#endif // LL_LLFLOATERREGIONDEBUGCONSOLE_H
diff --git a/indra/newview/llviewerfloaterreg.cpp b/indra/newview/llviewerfloaterreg.cpp
index b3f14b441d4e468c2dfacee9f720b1601688b765..f573f25efe79727216cac4a46522f2a831cd3a27 100644
--- a/indra/newview/llviewerfloaterreg.cpp
+++ b/indra/newview/llviewerfloaterreg.cpp
@@ -81,6 +81,7 @@
 #include "llfloaterpostprocess.h"
 #include "llfloaterpreference.h"
 #include "llfloaterproperties.h"
+#include "llfloaterregiondebugconsole.h"
 #include "llfloaterregioninfo.h"
 #include "llfloaterreporter.h"
 #include "llfloaterscriptdebug.h"
@@ -227,6 +228,7 @@ void LLViewerFloaterReg::registerFloaters()
 	
 	LLFloaterReg::add("reporter", "floater_report_abuse.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterReporter>);
 	LLFloaterReg::add("reset_queue", "floater_script_queue.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterResetQueue>);
+	LLFloaterReg::add("region_debug_console", "floater_region_debug_console.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterRegionDebugConsole>);
 	LLFloaterReg::add("region_info", "floater_region_info.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterRegionInfo>);
 	
 	LLFloaterReg::add("script_debug", "floater_script_debug.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterScriptDebug>);
diff --git a/indra/newview/llviewerregion.cpp b/indra/newview/llviewerregion.cpp
index b684206960b329d900492b2f38d23fb8bb2d490f..ca07e7c4cf1886ecb7979e04af7e84c954b7949a 100644
--- a/indra/newview/llviewerregion.cpp
+++ b/indra/newview/llviewerregion.cpp
@@ -1400,6 +1400,8 @@ void LLViewerRegion::setSeedCapability(const std::string& url)
 	capabilityNames.append("SendUserReportWithScreenshot");
 	capabilityNames.append("ServerReleaseNotes");
 	capabilityNames.append("SetDisplayName");
+	capabilityNames.append("SimConsole");
+	capabilityNames.append("SimConsoleAsync");
 	capabilityNames.append("StartGroupProposal");
 	capabilityNames.append("TextureStats");
 	capabilityNames.append("UntrustedSimulatorMessage");
diff --git a/indra/newview/skins/default/xui/en/floater_region_debug_console.xml b/indra/newview/skins/default/xui/en/floater_region_debug_console.xml
new file mode 100644
index 0000000000000000000000000000000000000000..cf95257b0a508d9d5a1e937f4c6ff4a7894cc68e
--- /dev/null
+++ b/indra/newview/skins/default/xui/en/floater_region_debug_console.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<floater
+  name="region_debug_console"
+  title="Region Debug"
+  layout="topleft"
+  min_height="300"
+  min_width="300"
+  height="400"
+  width="600"
+  default_tab_group="1">
+  <text_editor
+  left="10"
+   type="string"
+   length="1"
+   follows="left|top|right|bottom"
+   font="Monospace"
+   height="366"
+   width="576"
+   ignore_tab="false"
+   layout="topleft"
+   max_length="65536"
+   name="region_debug_console_output"
+   show_line_numbers="false" 
+   word_wrap="true"
+   track_end="true"
+   read_only="true">
+  </text_editor>
+  <line_editor
+   border_style="line"
+   border_thickness="1"
+   tab_group="1" 
+   follows="left|top|right"
+   font="SansSerif"
+   height="19"
+   layout="topleft"
+   bottom_delta="20"
+   max_length="127"
+   name="region_debug_console_input"
+   top_delta="0"
+   width="576" />
+</floater>
diff --git a/indra/newview/skins/default/xui/en/menu_viewer.xml b/indra/newview/skins/default/xui/en/menu_viewer.xml
index 796b15551a8e6567c9402904c8dede1ab217eaee..9fcf952bf0f3a0ea6a1adb862eac323258a569b5 100644
--- a/indra/newview/skins/default/xui/en/menu_viewer.xml
+++ b/indra/newview/skins/default/xui/en/menu_viewer.xml
@@ -2680,6 +2680,18 @@
                  function="ToggleControl"
                  parameter="DoubleClickTeleport" />
             </menu_item_check>
+            <menu_item_check
+             label="Region Debug Console"
+             name="Region Debug Console"
+             shortcut="control|shift|`"
+             use_mac_ctrl="true">
+                <menu_item_check.on_check
+                 function="Floater.Visible"
+                 parameter="region_debug_console" />
+                <menu_item_check.on_click
+                 function="Floater.Toggle"
+                 parameter="region_debug_console" />
+            </menu_item_check>
 
             <menu_item_separator />
 
diff --git a/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml b/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
index dd01683c519360a11aa0f136fcd3cc981617fa13..d6e4c5611363e08b7b435a383db2a0737b1c93e7 100644
--- a/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
+++ b/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
@@ -89,6 +89,7 @@
      top_pad="20"
      width="237"/>
     <check_box
+     control_name="ForceShowGrid"
      follows="top|left"
      height="15"
      label="Show Grid Selection at login"
@@ -98,6 +99,7 @@
      top_pad="5"
      width="237"/>
     <check_box
+     control_name="UseDebugMenus"
      follows="top|left"
      height="15"
      label="Show Advanced Menu"
@@ -107,6 +109,7 @@
      top_pad="5"
      width="237"/>
     <check_box
+     control_name="QAMode"
      follows="top|left"
      height="15"
      label="Show Developer Menu"