Version: (using KDE 4.2.0) OS: Linux Installed from: Debian testing/unstable Packages The new Screen Edges facility (kcm_kwincompositing) seems to use the timeout from Window Behaviour -> Advanced -> Active Desktop Borders. I figured this by accident and think it's a little unobvious. I don't know if the Active Desktop Borders and Screen Edges features will get merged, but if not I'd like to see the delay to be configurable in both kcms (or even separate delays).
Not really a duplicate but it will be should be taken care of at the same time. *** This bug has been marked as a duplicate of bug 174709 ***