Comment # 23 on bug 953954 from Wolfgang Bauer

(In reply to Jaroslav Kamen�k from comment #22)
> I tried your new package, opera has white background, pidgin black

Yes. As mentioned, the patch basically just removes all transparency (i.e. the
alpha channel), making the "transparent" images appear.
It doesn't modify the actual image data.

Opera does apparently draw a white background, but pidgin not.

> but both are visible, notifications in icons too:). Thanx!

Thanks for confirming!

For the record, I found a way to reproduce this on my real hardware running
13.2: just add "nomodeset" to the boot options.

So this is definitely not specific to Leap, but more to the graphics driver as
suspected.
Might be a bug in Qt5...