Comment 16 for bug 24243

Confirm on 8.04, seen it from release to release. Also happens on vertical panel (with the applet colapsed to a 1-pixel width column). Happens from time to time, unpredictably, but i used to believe it was related to particularly heavy starts. Say, with a lots of apps in the session. Perhaps a race condition, with the panel?
When colapsed, the applet still behaves normally: the lines move, and it responds to the mouse (if you have good aim, this is). Changing the size in the preferences windows resets it.