Commented Issue: Error while adding a tab control to my webpage [26958]

When I add a tab control to my webpage, I reveice the following error:
Locating source for 'C:\Users\Stephen\Downloads\ajaxcontroltoolkit-a497357d78ce\AjaxControlToolkit_a497357d78ce\Server\AjaxControlToolkit\ExtenderBase\ScriptControlBase.cs'. Checksum: MD5 {96 b3 2 f1 ca 17 5a 39 6e 7 1f c6 68 2f e2 bf}
The file 'C:\Users\Stephen\Downloads\ajaxcontroltoolkit-a497357d78ce\AjaxControlToolkit_a497357d78ce\Server\AjaxControlToolkit\ExtenderBase\ScriptControlBase.cs' does not exist.
Looking in script documents for 'C:\Users\Stephen\Downloads\ajaxcontroltoolkit-a497357d78ce\AjaxControlToolkit_a497357d78ce\Server\AjaxControlToolkit\ExtenderBase\ScriptControlBase.cs'...
Looking in the projects for 'C:\Users\Stephen\Downloads\ajaxcontroltoolkit-a497357d78ce\AjaxControlToolkit_a497357d78ce\Server\AjaxControlToolkit\ExtenderBase\ScriptControlBase.cs'.
The file was not found in a project.
Looking in directory 'C:\Program Files\Microsoft Visual Studio 10.0\VC\crt\src\'...
Looking in directory 'C:\Program Files\Microsoft Visual Studio 10.0\VC\atlmfc\src\mfc\'...
Looking in directory 'C:\Program Files\Microsoft Visual Studio 10.0\VC\atlmfc\src\atl\'...
Looking in directory 'C:\Program Files\Microsoft Visual Studio 10.0\VC\atlmfc\include\'...
The debug source files settings for the active solution indicate that the debugger will not ask the user to find the file: C:\Users\Stephen\Downloads\ajaxcontroltoolkit-a497357d78ce\AjaxControlToolkit_a497357d78ce\Server\AjaxControlToolkit\ExtenderBase\ScriptControlBase.cs.
The debugger could not locate the source file 'C:\Users\Stephen\Downloads\ajaxcontroltoolkit-a497357d78ce\AjaxControlToolkit_a497357d78ce\Server\AjaxControlToolkit\ExtenderBase\ScriptControlBase.cs'.
It looks like there is a mistake made with a hardcoded path. I don't have a use stephen on my machine, so there can't be any reference to it.

Running a WXP machine with VS2010/SP1
Comments: I am seeing this error as well