Version: (using KDE KDE 3.5.0) Installed from: Compiled From Sources Usually you use Alt+Tab to switch to another window. Then, when you've finished your task there, you press Alt+Tab again to return to the previous window. Pressing Alt+Tab multiple times will cycle though multiple windows, respectively. However, when you switch off "show windowlist" in the kcontrol module "window properties", Alt+Tab behaviour goes nuts and brings up windows in a totally different and nondeterminant order each time you press it. Hence, while not plagued with performance issues (see bug 117169), this bug incurs a high loss of usability, making Alt+Tab without windowlist unusable for more than two windows per desktop.
The "show windowlist" mode is in fact KDE-style Alt+Tab, while when turned off it's the CDE-style Alt+Tab, so this is a feature. The fact the nothing in the UI says so is a result of a usability "improvement". *** This bug has been marked as a duplicate of 118184 ***