When I first installed Fedora and got to the login screen I simply typed in my password, and then after logging in realised I was in Gnome and logged out and back in to KDE. This caused a number of problems with the menu editing in KDE, but I also believe this was the cause of the Trashcan problem too.
The reason I believe this is that the problem manifested itself straight away in the first install, yet was clearly not evident in the installation I performed yesterday, and the only difference between the first and second installations is that I didn't accidentally use Gnome in the latter!
As of yet I have not managed to find an actual solution to the problem, but with knowledge that it is _possibly_ being caused by a conflict between Gnome and KDE, maybe we can find one now?
-- Dylan Parry http://www.webpageworkshop.co.uk - FREE Web tutorials and references