Hello,
I took a look at the wxPython demo that came with the latest version of 2.5, especially the validators demo. It works fine if I try to enter some digits into the alpha field - they're not accepted. However, if I simply copy and paste some digits into the text field, it doesn't ignore them anymore. Don't know if it's a bug or the demo is not supposed to catch this case, just wanted to let you know.
-Nitro