Wrong Time Capsule Icon

First, let me start by saying that i have absolutley no problems with Time Machine, the backup progress is working very well. There is only one small aesthetic problem: In the Finder in the Sidebar my Time Capsule (in my case it's a Time Capsule Emulation by WD, the MyBook World Edition) there is the wrong icon next to the drives name. On every other computer it displays the TIme Capsule Icon but in mine it's the generic Server icon. Screenshot: http://img72.imageshack.us/i/bildschirmfoto20100228u.png/ you see that the "Monopol" icon is the right one, but "Monopol-Backup" should have the Time Capsule Icon. I know the tricks to hide the entry, that is not the problem...
Any ideas?
Thanks, Julian.