Probably the most frequent operation that I do when fixing a bugzilla bug is to display all package activity. While it's not *too* hard to do that, a single button click to display all package activity in any state would help me.
Red Hat's current Bugzilla version is 2.18. I am moving all older open bugs to this version. Any bugs against the older versions will need to be verified that they are still bugs. This will help me also to sort them better.