Hi all.
First, sorry for my ugly english

I'm using Gentoo, built KDE 4.4.3 (tonight).
When effects are enabled, all works fine - no artefacts or something else (but feels slow on my chipset).

when effects are disabled, it's works very fast, but:
when moving windows or switching menu items (of KDE menu with classic style), in places where was window (or menu), at first appears black blocks and then desktop redraws. so, desktop redraws not instantly - black artefacts and then desktop.

anyone knows how to fix it?

Intel GM965 with 2.10.0 driver, Mesa 7.7.1, Xorg 1.7.6.

Does the Desktop redraw if you move over it only? ie. if you don't move over it does it remain corrupt?