A month ago I had access to Debug XSLT under the xml menu in visual studio 2010. When I attempted to debug today the command was missing. I then attempted to customize the menu and add the commands back, but the commands are not listed under the xml item. I still have the commands available for vs 2008 and 2005 and i know that xslt profiler was included with vs 2010.
I have found what has caused the issue. Every person in my department that has installed the most recient windows updates no longer can use the xslt debuggin options. This appears to be a bug with this update.
Update for Microsoft Visual Studio 2010 Tools for Office Runtime (KB2796590)
Installation date: 1/9/2013 10:03 AM
Installation status: Successful
Update type: Important
Fixes for the following issues found in Visual Studio Tools for Office Runtime in Visual Studio 2010: Unable to delete VSTO Control if another embedded object exists in the document; Hostname cannot be parsed (and crash) when opening a document from secure UNC WebDav Share; Cached Data storage fails in protected documents; Cannot customize, or check if customized, any Word 2010 document with Ink; Adds runtime support for addins that target .NET 4.5