This is on b10 on x86_64. Sometimes, when hitting Ctrl-E, I'll notice that all my tab groups have gone wrong. Panorama arbitrarily moved all tabs into one group, leaving only a handful of tabs in their right group (I'd say, 5). Apart from the fact that it's infuriating, the bad thing about it is I have zero idea about how it happens. It seems random, although I'd say this has happened ~5 times in the past week. Another symptom is that once you've moved all your tabs into the right group, the order of tabs in panorama is not the same as the order of tabs in the tabbrowser (i.e. when not in panorama mode). Moving one tab using the tabbrowser seems to poke Panorama, because opening panorama after that shows a consistent order of tabs. :Rik on IRC also experienced the issue, but neither he nor I have been able to find consistent steps that reproduce the issue. It might happen after a crash, I couldn't tell, really...

(In reply to comment #0) > Another symptom is that once you've moved all your tabs into the right group, > the order of tabs in panorama is not the same as the order of tabs in the > tabbrowser (i.e. when not in panorama mode). Moving one tab using the > tabbrowser seems to poke Panorama, because opening panorama after that shows a > consistent order of tabs. This got fixed with bug 616729 and will be in b11.

(In reply to comment #0) > Sometimes, when hitting Ctrl-E, I'll notice that all my tab groups have gone > wrong. Panorama arbitrarily moved all tabs into one group, leaving only a > handful of tabs in their right group (I'd say, 5). Apart from the fact that > it's infuriating, the bad thing about it is I have zero idea about how it > happens. It seems random, although I'd say this has happened ~5 times in the > past week. > > :Rik on IRC also experienced the issue, but neither he nor I have been able to > find consistent steps that reproduce the issue. > > It might happen after a crash, I couldn't tell, really... Do you have any add-ons installed? Quite the same effect is caused by the 'Hard Blockers Count' extension, tracked in bug 628188.

I do have the Hard Blockers Count extension so this might be a dupe if Jonathan is also using it.

Yes I do have the hard blockers extension, how could this possibly be related? That's a long shot. Anyway, duping, sorry for the noise.

(In reply to comment #4) > Yes I do have the hard blockers extension, how could this possibly be related? > That's a long shot. Anyway, duping, sorry for the noise. > > *** This bug has been marked as a duplicate of bug 628188 *** We're not sure how it's related, but we can verify if you uninstall that add-on, this behavior no longer happens.