Version: unspecified (using KDE 4.5.85) OS: Linux It seems that window thumbnails have black areas instead of transparent ones. Check out the screenshot. It appears not only in expose (or present windows or whatever you name it). The same black halo is in the thumbnails in taskbar. I have kde 4.5.85 and qt 4.7.1 from opensuse 11.3 factory repo and NVIDIA 260.19.12 driver (GeForce Go 7600). Reproducible: Always Steps to Reproduce: Just enable expose or window thumbnails in taskbar
Black halo around windows in expose: http://picasaweb.google.com/lh/photo/_tD-MRCBCy8jX1UnsJuEQw?feat=directlink Black halo around windows in thumbnails: http://picasaweb.google.com/lh/photo/RUL6ywLZxispi72McYjP8A?feat=directlink
*** This bug has been marked as a duplicate of bug 258439 ***