Scrolling the Flash ads in the sidebar on http://syria.liveuamap.com causes the ads to have topmost z-order, passing over the top of the page Example ad code: <object id="flashObjSekindoVPlayer24610" data="http://live.sekindo.com/content/video/vplayer/vPlayer_v1.0.9.swf" type="application/x-shockwave-flash" width="300" height="250"> <param name="allowfullscreen" value="true"><param name="movie" value="http://live.sekindo.com/content/video/vplayer/vPlayer_v1.0.9.swf"><param name="allowscriptaccess" value="always"><param name="quality" value="high"><param name="bgcolor" value="#000000"><param name="wmode" value="window"></object>

Do you know if this is the same underlying issue as bug 1152049?

Doesn't sound like it. I can't reproduce though on this page. The ads and videos are clipped correctly by the sidebar afaict. vladan, do you have specific str here?

(Also a screenshot would be helpful)

STR: 1. Load http://syria.liveuamap.com 2. Set the "src" attribute of one of the ad iframes in the sidebar to "http://people.mozilla.org/~vdjeric/bug1229451.html" For example: document.getElementById("aswift_3").src = URL; 3. Scroll the sidebar down until the newly added flash object covers the top of the page (see screenshot)

Ok, I was able to reproduce with apz enabled. dom scroll works fine. It looks like the plugin window doesn't get updated clipping as the content scrolls. It's not the same problem as bug 1152049 (that's chrome clipping vs. content) but it might get fixed by the same patch. Marking dependent.

Bug 1152049 just landed on m-c, can you please check on the next nightly to see if this still happens? Thanks!

Yes, the Z-order issue is fixed. The flash object blinks when it's scrolled but I think that's a different known bug

Awesome, thanks for checking!