I am mainly an Xubuntu user now, but have run into a pesky bug with how the Xubuntu desktop works in version 12.04. When I try to open the filemanger using either the menu or the icon it hangs for a minute or two. Apparently, this is bug has been around for quite some time in Xubuntu.
Here is how to fix a hanging file manager window in Xubuntu 12.04:
1. Open the software manager either through the menu or by opening a terminal window and typing: sudo software-manager.
2. In the software manager type: gvfs-backend.
3. Click on the 'More info' tab, then click 'Remove'
Removing this piece of software does not seem to have any adverse effects, and your file manager will behave properly!