UpdatePsychtoolbox failure

I just tried to update PTB and got the following output:

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>> UpdatePsychtoolbox
UpdatePsychtoolbox(' c:\toolbox\Psychtoolbox\ ')

About to update your working copy of the OpenGL-based Psychtoolbox.
Will execute the following update command:
svn update "c:\toolbox\Psychtoolbox\"
svn: Error resolving case of 'c:\toolbox\Psychtoolbox"'
Sorry. The update command failed:
svn: Error resolving case of 'c:\toolbox\Psychtoolbox"'

??? Error using ==> UpdatePsychtoolbox at 124
Update failed.
>>
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c:\toolbox\Psychtoolbox exists, and PTB is otherwise working fine. Subversion is installed and I have updated previously. I tried searching the forum but could only view one page of hits for 'UpdatePsychtoolbox'; clicking on the next page arrow took me to a search page that doesn't work (no idea what that's about).

I do note that the error is reporting the path with a mixed bag of quotes which may be relevant? That's nothing I'm doing, I tried calling UpdatePsychtoolbox with the path specified and got the same thing. There's also nothing in the UpdatePsychtoolbox.m file that's appending that extra " at the end, so it may be a subversion thing.

I'm on WinXP, currently running Matlab 7.9.0 R2009b and PTB version 3.0.8. (Build date: Aug 17 2009).

Thanks!
-andrew