In the Configuration > Source Repository screen, with a Repository type of "Perforce", the "Web Repository URL" value is not persisted. This does not happen using a Subversion repository (haven't tried CVS).

Filling this value out with a link to our FishEye instance (using the 1.3 beta that has Perforce support) doesn't work, as the value isn't saved. This means that we don't get any links from the changes tab of our build.

Can't reasonably count this as a major, but I find it really annoying, as one of the main reasons I'm pushing my team to use Bamboo over other solutions is the FishEye link.