Version:            (using KDE KDE 3.0.99)
Installed from:    Mandrake RPMs
OS:          Linux

On a multi-head setup with multiple screens (ie. not Xinerama) and the panel set to auto-hide, when the cursor approaches the relevant edge of any one screen, the panel unhides on all screens. The fact that the panels on each screen can be configured separately implies (to me anyway) that they should behave totally independently and therefore should only unhide on the screen where the cursor is.
 With the panels on different edges it becomes clearer that the panel unhides when the cursor's y (panel top/bottom edge) or x (panel left/right edges) determines when it is shown, but not check is made on the other co-ordiante (x or y respectively) to check which screen the cursor is on. If one places the panel on the common edge between the two screens then it gets _very_ difficult to actually trigger the show event.

Ok, so multi-head non xinerama setups are probably not that common :-)