I have a Fujitsu notebook with proprietary ATI drivers which support constant alpha blending but not per-pixel. With WB5, Taskbar and Please Wait dialog transparency works fine but window border/Titlebar transparency does not (the Titlebar and borders are opaque, presumably because they are per-pixel borders which my drivers don't support - Doh). What's different about the Taskbar and Please Wait dialogs that they don't need per-pixel to be transparent?
I said it was a dumb question.
Thanks,
Daiwa