User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0 Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0 In panorama, my top tab groups, that are flush with the top of the designated space, are migrating beyond the top of the window by something like 100-200 pixels when I have the panorama closed. This happens pretty much at random and started with one of the Betas. I tried reporting it through support but got no response. Reproducible: Sometimes Steps to Reproduce: 1. Open Firefox 2. Create tab groups (two+) flush with the top of the window. 3. Click off of panorama, come back later. Actual Results: It's pretty random as to when it does and doesn't happen. It happens less than half of the time, and I can't figure out what the specific trigger is. What does happen when it goes wrong is that they jump up past the top of the screen by an inch or so and stay there until I grab them and pull them back. tabs groups below them stay put. Expected Results: The tab groups should remain relatively where I placed them.

Managed to reproduce it, again, I don't know why it happens sometimes but not others. here is a screen capture: http://i51.tinypic.com/29x7p4x.jpg sorry I had to block out some pages, I tried not to change the integrity of the items in the broken window... I just needed to erase what they were. I can't release images of the work for that client at the moment.

We'll keep an eye out for this. Can anyone else reproduce with consistent steps so we can test this?

I've had it happen on my home system as well as my work system, but I can't seem to get it to work on a consistent basis.

(In reply to comment #3) > I've had it happen on my home system as well as my work system, but I can't > seem to get it to work on a consistent basis. or, to be clear, I can't seem to get the bug to occur on a consistent basis.

RaineDragon: does this happen if you make some of your groups smaller so your entire Panorama Window isn't full? Anyone else seeing this? Either on XP or another operating system? It would be nice to narrow down this bug a little.

(In reply to comment #5) > RaineDragon: does this happen if you make some of your groups smaller so your > entire Panorama Window isn't full? > > Anyone else seeing this? Either on XP or another operating system? It would be > nice to narrow down this bug a little. I hadn't noticed one way or the other before. However, I've had empty space left over in my panorama all day today and not encountered the error in about 7 hours. I covered the full space again after seeing your message (20 min ago) and after checking just now, I've encountered the error with the top-right tab group (one out of two tab groups touching the top). It does not happen immediately, from what I have seen. Unfortunately, I do not know at what point in that 20min span the error started.

Ah, then it appears that we have issues with our pushAway code. Thank you for checking that out for me.

Gah. Meant to add that it is a dupe of bug 587140

Unfortunately, I just got the bug with the windows not filling the whole screen.

This bug has been made a duplicate of bug 587140, which is currently marked as assigned (ie not fixed), which is why you are still experiencing the issue.