For example on the bugzilla advanced search page. Scrolling the components <select>, the scrollbar thumb disappears and reappears again after a timeout. Similarly, some of the items might disappear and reappear too after a delay. One can still select an item, the focus background is drawn, but the icon text isn’t. This works fine with OMTC enabled (layers acceleration force-enabled)

(might be important: It’s on a recent archlinux with intel graphics)

With the newest nightly, the text is there, but the scrollbar is still disappearing and reappearing after a delay.

Nightly from 27.5. works Nightly from 29.5. the scrollbar thumbs disappear and *do not* reappear after a delay. Also, not only the currently scrolling one disappears, but all of them. Sometimes they are only partially displayed. They also disappear on hover, opposed to only on scroll.

I'm hoping that the patch for bug 1066934 fixed this. Here's a try build with that patch: http://ftp.mozilla.org/pub/mozilla.org/firefox/try-builds/mstange@themasta.com-36dd1e01d42f/try-linux64/ Can you please check whether the bug is fixed in that build? Thanks.

Seems to work with the limited testing I have done with that build.