The new Bugzilla version is really nice, but I have one complaint.  Today I was adding a comment to a bug report, and I got dragged away helping a user for half an hour.  When I finished and submitted the form, it gave me a warning box saying (approximately) "The comment you submitted had a an invalid token.  This might be the result of someone inducing you to go to this URL without your intent.  Submit changes anyway, or toss them?"  I picked "submit anyway", and the comment got posted.  

My diagnosis is that one of the cookies set with the form has a relatively short lifetime.  With the old Bugzilla I could leave the form open for several hours while I tracked down something I thought relevant, and it would be nice if that were once again possible (minus the lurid warning).