See this tweet: https://twitter.com/jonathansampson/status/496796678708416512 and this video: https://www.youtube.com/watch?v=HOPpP_Vmohs Basically on windows 8, with FF34, the event popup has various weird rendering issues in the code editor. Especially when scrolling.

I can easily reproduce this on a Windows 8 VM and the behaviour is consistent: - Scrolling stretches text or results in a blank area. - Occasionally, scrolling to the very left makes all of the headers disappear. Waiting for approx. 5 seconds results in the elements being rendered correctly. The same widget works perfectly in other parts of our tools... the only real difference is that this is in a XUL panel.

this also happens for me on widows 7 64-bit

Mike, any idea who could investigate this? We getting more and more duplicate reports of the issue.

John, do you have any idea what could be causing this?

Hmm, no idea, that's bizarre. Does it only happen the first time for a given page? browser run? And you can reproduce this with current trunk builds on Win7 or Win8? Mike, if you could list a quick set of steps to reproduce that would be helpful.

(In reply to John Daggett (:jtd) from comment #10) > Hmm, no idea, that's bizarre. Does it only happen the first time for a given > page? browser run? And you can reproduce this with current trunk builds on > Win7 or Win8? > > Mike, if you could list a quick set of steps to reproduce that would be > helpful. Sure... you need to be running Windows 8. 1. Go to about:home 2. Right-click the globe and inspect element. 3. In the toolbox click the ev bubble connected with the html tag. 4. Click on the pageshow header to open the connected code. 5. Scroll up and down slowly... the text will keep going blank etc. as described in comment 5.

This is not specific to only Windows environment. Also produce in Linux environment(Ubuntu).

This seems to be fixed in both nightly and developer edition (windows 8.1 64 bit).

Based on comment 15, closing this as works for me.