diff --git a/indra/llcommon/llstring.cpp b/indra/llcommon/llstring.cpp
index f14d947734e01534e2ed6381417b7ec46126fb3c..1561bda2018d0539c9bce6ea5d597e44a3589a82 100644
--- a/indra/llcommon/llstring.cpp
+++ b/indra/llcommon/llstring.cpp
@@ -994,7 +994,14 @@ void LLStringUtil::formatNumber(std::string& numStr, std::string decimals)
 	convertToS32 (decimals, intDecimals);
 	if (!sLocale.empty())
 	{
-		strStream.imbue (std::locale(sLocale.c_str()));
+		// std::locale() throws if the locale is unknown! (EXT-7926)
+		try
+		{
+			strStream.imbue(std::locale(sLocale.c_str()));
+		} catch (const std::exception &)
+		{
+			LL_WARNS_ONCE("Locale") << "Cannot set locale to " << sLocale << LL_ENDL;
+		}
 	}
 
 	if (!intDecimals)
diff --git a/indra/llwindow/llwindowmacosx-objc.mm b/indra/llwindow/llwindowmacosx-objc.mm
index 59b25e17268ca57fc4c4d90b0bf46ac7bb601a49..3a822a93a668690ff016e0d3dbeebcdb3a8f50d2 100644
--- a/indra/llwindow/llwindowmacosx-objc.mm
+++ b/indra/llwindow/llwindowmacosx-objc.mm
@@ -49,6 +49,11 @@ void setupCocoa()
 	{
 		NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 		
+		// The following prevents the Cocoa command line parser from trying to open 'unknown' arguements as documents.
+		// ie. running './secondlife -set Language fr' would cause a pop-up saying can't open document 'fr' 
+		// when init'ing the Cocoa App window.		
+		[[NSUserDefaults standardUserDefaults] setObject:@"NO" forKey:@"NSTreatUnknownArgumentsAsOpen"];
+		
 		// This is a bit of voodoo taken from the Apple sample code "CarbonCocoa_PictureCursor":
 		//   http://developer.apple.com/samplecode/CarbonCocoa_PictureCursor/index.html
 		
diff --git a/indra/newview/Info-SecondLife.plist b/indra/newview/Info-SecondLife.plist
index 97e24a0bd560a052985c09e36acd4fb9a8f0b9b2..9bc95f9b95d9ccd30416fa9c6a85c5facf027132 100644
--- a/indra/newview/Info-SecondLife.plist
+++ b/indra/newview/Info-SecondLife.plist
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
@@ -18,33 +18,33 @@
 	<string>APPL</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
-        <key>CFBundleDocumentTypes</key>
-        <array>
-                <dict>
-                        <key>CFBundleTypeExtensions</key>
-                        <array>
-                                <string>slurl</string>
-                        </array>
-                        <key>CFBundleTypeIconFile</key>
-                        <string>seconlife</string>
-                        <key>CFBundleTypeMIMETypes</key>
-                        <array>
-                                <string>application/x-grid-location-info</string>
-                        </array>
-                        <key>CFBundleTypeName</key>
-                        <string>Secondlife SLURL</string>
+	<key>CFBundleDocumentTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeExtensions</key>
+			<array>
+				<string>slurl</string>
+			</array>
+			<key>CFBundleTypeIconFile</key>
+			<string>seconlife</string>
+			<key>CFBundleTypeMIMETypes</key>
+			<array>
+				<string>application/x-grid-location-info</string>
+			</array>
+			<key>CFBundleTypeName</key>
+			<string>Secondlife SLURL</string>
 			<key>CFBundleTypeOSTypes</key>
 			<array>
-			  <string>SLRL</string>
+				<string>SLRL</string>
 			</array>
-                        <key>CFBundleTypeRole</key>
-                        <string>Viewer</string>
-                        <key>LSTypeIsPackage</key>
+			<key>CFBundleTypeRole</key>
+			<string>Viewer</string>
+			<key>LSTypeIsPackage</key>
 			<true/>
-                        <key>NSDocumentClass</key>
-                        <string>SecondLifeSLURL</string>
-                </dict>
-        </array>
+			<key>NSDocumentClass</key>
+			<string>SecondLifeSLURL</string>
+		</dict>
+	</array>
 	<key>CFBundleURLTypes</key>
 	<array>
 		<dict>