[Not Irrlicht!] Icon Symbols changing

[Squarefox2]

Hello,

I don't know if this is a bug with Irrlicht, my own code or my grafics card:

I've written a 3D-Game. Sometimes after I played it and close the
programm some of my windows icons show wrong symbols
(for example a .dll file shows a .pdf icon).

Then I restart my game and close it again.
Then everything is correct now.

[Squarefox2]

I think it's a Windows Bug:

http://support.microsoft.com/kb/132668

Greetings,
Squarefox