GVIM and Windows XP problem

I've been using gvim version 7.1 for a long time without any problems.
Somewhere between Friday afternoon and Monday it lost the ability to
display the menu or toolbar (though the gray area for the toolbar is
there).
<p>
Things I've tried:
<ul>
<li>Uninstalling 7.1 and installing 7.3. Also deleting my rc files in
the process.
<li>Rebooting after each attempt.
<li>Checking environment variables including the PATH.
<li>Resizing, minimizing, and maximizing the gvim window.
<li>Running :set guioptions+=m. Nothing happened.
<li>Running :set guioptions+=T (and -=T). This did toggle the gray
area but didn't display the toolbar icons.
</ul>
I've run out of ideas and Googling hasn't turned up any suggestions
that worked. It feels like a Windows issue but I'm not sure how to jog
it loose.
<p>
Carey

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