had the same problem with KDE 4.2.4 on Arch Linx 64bit on a Dell Studio with Mobility Radeon HD 3450.
For me it worked to set "Fenster-Vorschaubilder vorhalten" to "always".
Sorry for the german word. I don't know how to get the english terms. But
"Fenster-Vorschaubilder" should be something like "Windows Preview Images"
Maybe my attached screenshot helps :-)
hm. just recognized, that unminimize windows works well, but resizing windows keeps a PITA.
had the same problem with KDE 4.2.4 on Arch Linx 64bit on a Dell Studio with Mobility Radeon HD 3450. Vorschaubilder vorhalten" to "always". Vorschaubilder" should be something like "Windows Preview Images"
For me it worked to set "Fenster-
Sorry for the german word. I don't know how to get the english terms. But
"Fenster-
Maybe my attached screenshot helps :-)
hm. just recognized, that unminimize windows works well, but resizing windows keeps a PITA.