For me, it looks different. The bitmap is drawn correctly, only the background is not redrawn properly.
This is normal layered window behaviour, nothing to do about.
No.
That is the way you can do "faking alpha compositing in linux", taking a screenshoot of what is below the window, thus simulating a real alpha on the image. Only recent cvs versions of X11R7 with alpha compositing activated and new video cards support real alpha compositing.
In windows is another history. Previos versions to Windows 2000 didn't have real transparency and had to do the same trick.
However, in 2000 it supports real transparency.
I wonder if some of you have noticed that
wxAUI in 2000/XP haves
real transparency when dragging a panel. That's not the case in other OS (Win 9x, Linux, etc).
So here the bug is only
wxSplashScreen. Nothing to do with Bill Gates in this case (sadly).