wxmsw26uh_vc.dll again ?

I'm trying to upgrade things. Upon doing so, I find that pylab gives a warning about not finding wxmsw26uh_vc.dll

A search suggested that I need the unicode version of wx. I installed that, but still get the same message.
(Thinking I accidently installed the ansi version, I downloaded and installed the unicode version again.)

what do you think?