diff --git a/indra/lib/python/indra/util/llversion.py b/indra/lib/python/indra/util/llversion.py
index 2718a85f414cb958db30e8035bf21742583a084b..ba6f567b607f43792231d18a19857068d587f408 100644
--- a/indra/lib/python/indra/util/llversion.py
+++ b/indra/lib/python/indra/util/llversion.py
@@ -1,7 +1,9 @@
-"""@file llversion.py
-@brief Utility for parsing llcommon/llversion${server}.h
-       for the version string and channel string
-       Utility that parses hg or svn info for branch and revision
+#!/usr/bin/env python
+"""\
+@file  llversion.py
+@brief Parses llcommon/llversionserver.h and llcommon/llversionviewer.h
+       for the version string and channel string.
+       Parses hg info for branch and revision.
 
 $LicenseInfo:firstyear=2006&license=mit$
 
@@ -27,7 +29,7 @@
 $/LicenseInfo$
 """
 
-import re, sys, os, commands
+import re, sys, os, subprocess
 
 # Methods for gathering version information from
 # llversionviewer.h and llversionserver.h
@@ -73,29 +75,13 @@ def get_viewer_channel():
 def get_server_channel():
     return get_channel('server')
 
-# Methods for gathering subversion information
-def get_svn_status_matching(regular_expression):
-    # Get the subversion info from the working source tree
-    status, output = commands.getstatusoutput('svn info %s' % get_src_root())
-    m = regular_expression.search(output)
-    if not m:
-        print >> sys.stderr, "Failed to parse svn info output, result follows:"
-        print >> sys.stderr, output
-        raise Exception, "No matching svn status in "+src_root
-    return m.group(1)
-
-def get_svn_branch():
-    branch_re = re.compile('URL: (\S+)')
-    return get_svn_status_matching(branch_re)
-
-def get_svn_revision():
-    last_rev_re = re.compile('Last Changed Rev: (\d+)')
-    return get_svn_status_matching(last_rev_re)
-
+# Methods for gathering hg information
 def get_hg_repo():
-    status, output = commands.getstatusoutput('hg showconfig paths.default')
+    child = subprocess.Popen(["hg","showconfig","paths.default"], stdout=subprocess.PIPE)
+    output, error = child.communicate()
+    status = child.returncode
     if status:
-        print >> sys.stderr, output
+        print >> sys.stderr, error
         sys.exit(1)
     if not output:
         print >> sys.stderr, 'ERROR: cannot find repo we cloned from'
@@ -103,24 +89,19 @@ def get_hg_repo():
     return output
 
 def get_hg_changeset():
-    # The right thing to do:
-    # status, output = commands.getstatusoutput('hg id -i')
-    # if status:
-    #     print >> sys.stderr, output
-    #    sys.exit(1)
-
-    # The temporary hack:
-    status, output = commands.getstatusoutput('hg parents --template "{rev}"')
+    # The right thing to do would be to use the *global* revision id:
+    #     "hg id -i"
+    # For the moment though, we use the parent revision:
+    child = subprocess.Popen(["hg","parents","--template","{rev}"], stdout=subprocess.PIPE)
+    output, error = child.communicate()
+    status = child.returncode
     if status:
-        print >> sys.stderr, output
+        print >> sys.stderr, error
         sys.exit(1)
     lines = output.splitlines()
     if len(lines) > 1:
         print >> sys.stderr, 'ERROR: working directory has %d parents' % len(lines)
     return lines[0]
 
-def using_svn():
-    return os.path.isdir(os.path.join(get_src_root(), '.svn'))
-
 def using_hg():
     return os.path.isdir(os.path.join(get_src_root(), '.hg'))
diff --git a/scripts/update_version_files.py b/scripts/update_version_files.py
index da60fd105a93e35059e62a63107481f20bdcfec1..87036dc1c05e2a0f632c768e827fc27894a16418 100755
--- a/scripts/update_version_files.py
+++ b/scripts/update_version_files.py
@@ -1,8 +1,30 @@
-#!/usr/bin/python
-#
-# Update all of the various files in the repository to a new version number,
-# instead of having to figure it out by hand
-#
+#!/usr/bin/env python
+"""\
+@file   update_version_files.py
+@brief  Update all of the various files in the repository to a new version number,
+instead of having to figure it out by hand
+
+$LicenseInfo:firstyear=2010&license=viewerlgpl$
+Second Life Viewer Source Code
+Copyright (C) 2010-2011, Linden Research, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation;
+version 2.1 of the License only.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+$/LicenseInfo$
+"""
 
 import sys
 import os.path
@@ -37,9 +59,6 @@ def add_indra_lib_path():
 import getopt, os, re, commands
 from indra.util import llversion
 
-svn = os.path.expandvars("${SVN}")
-if not svn or svn == "${SVN}": svn = "svn"
-
 def usage():
     print "Usage:"
     print sys.argv[0] + """ [options]
@@ -68,7 +87,7 @@ def usage():
    Print this message and exit.
 
 Common Uses:
-   # Update server and viewer build numbers to the current SVN revision:
+   # Update server and viewer build numbers to the current hg revision:
    update_version_files.py
 
    # Update build numbers unless we are on a release branch:
@@ -80,7 +99,7 @@ def usage():
    # Update just the viewer version number explicitly:
    update_version_files.py --viewer --version=1.18.1.6     
 
-   # Update just the server build number to the current SVN revision:
+   # Update just the server build number to the current hg revision:
    update_version_files.py --server
                                
    # Update the viewer channel
@@ -152,9 +171,7 @@ def _getstatusoutput(cmd):
       'CFBundleGetInfoString = "Second Life version %(VER_MAJOR)s.%(VER_MINOR)s.%(VER_PATCH)s.%(VER_BUILD)s'))
 
 
-version_re      = re.compile('(\d+).(\d+).(\d+).(\d+)')
-svn_branch_re   = re.compile('^URL:\s+\S+/([^/\s]+)$', re.MULTILINE)
-svn_revision_re = re.compile('^Last Changed Rev: (\d+)$', re.MULTILINE)
+version_re = re.compile('(\d+).(\d+).(\d+).(\d+)')
 
 def main():
     script_path = os.path.dirname(__file__)
@@ -249,13 +266,7 @@ def main():
             server_version = new_version
     else:
 
-        if llversion.using_svn():
-            if new_revision:
-                revision = new_revision
-            else:
-                revision = llversion.get_svn_revision()
-            branch = llversion.get_svn_branch()
-        elif llversion.using_hg():
+        if llversion.using_hg():
             if new_revision:
                 revision = new_revision
             else:
@@ -327,5 +338,6 @@ def main():
             print "File %(filename)s not present, skipping..." % locals()
     return 0
 
-main()
+if __name__ == '__main__':
+    sys.exit(main())