I have a panel which has the following items: Show Desktop, Applications
menu, Actions menu, a few launcher icons, Window List, Notification Area
with Gaim and Multimedia Keys, Workspace Switcher, Clock, Volume Control
and Window Menu.

The problem is that it is not possible to select windows in the Window List
by clicking on the line which consists of the uppermost pixels (or
lowermost if the panel is moved to the  bottom of the screen). It would be
an improvement to make this possible.

To add to the confusion - this is not always the case, but it is sometimes
possible to click there, for unknown reasons.