Problems with minimizing & appearance properties

Once minimized, I cannot open a LastAgent window again. Further, the context menu entries have no behavior - they do nothing.

Another problem:
I set the appearance to "buttons" only. This turns out to display a window with no trims/decorations at all. I cannot move that window, nor can I close it anyhow. Left-click on the tray icon does not do anything. No behavior at all. It stays the same after killing (that was the only thing that helped then). Thus, I cannot call any options on the app anymore and have to de-/reinstall it. :/

edit:
I used the latest .deb (1h ago..) from D/L page on Kubuntu 8.10.

edit2:
I just learned that reinstalling does not the trick. But editing the display.new.conf does.