Ok, I'll try to explain better. Perhaps this is a bug or a feature request, but I noticed only in kde.
Amule's tray icon sucks.
It is shown in tray icon area as a white square with the amule's symbol (so no transparency or similar). Moreover the thin black vertical bar near the amule's symbol (the mule face) in the tray icon, which should be intended as a way to show download speed, is blocked. Sometimes it is full and I'm expecting a full download speed but I discover all files are completed, sometimes there's no bar (and so it should mean that there's no download) and I discover that I'm downloading at full speed...