Christophe Prud'homme wrote, On 2006-10-11 00:15:
[ Friday 6 October 2006 14:06 ] | I've reported this as Debian bug #391357. | | After several combinations of upgrades and downgrades, I've found that | the 3.5.5-1 versions of KDE packages work alright, but that kwin | 4:3.5.5-1 causes flickering / flashing of windows when a window is in | focus. confirmed.though when using the 'click to focus' policy, it is allright with kwin 4:3.5.5-1cu C.
I since reported this problem on bugs.kde.org:[Bug 135250] desktop unusable due to flickering of windows if not "focus follows click"
and a patch that fixes the problem has been released. See details at http://bugs.kde.org/135250
and a replacement kwin 3.5.5 i386 .deb is available at: http://mirror.pusling.com/kwin_3.5.5-1_i386.deb Arthur.