When resizing the width on the customizable "My Panels" panel on the left side of the screen, the page sometimes misrenders. There seem to be a couple of problems with this and the reproduction paths are different so I'll write them up as separate bugs though they may very well require only one fix. Steps to Reproduce: 1)type www.mozilla.org in the location box, and press return 2)when the page comes up click on the small lighter blue vertical bar in the center of the vertical blue divider that separates the "My Panels" box from the rendered page--the panel should collapse to the left. 3)the divider should be the only remaining visible portion of the panel. Click on the button on this bar again. Actual Results: When the bar expands out to the right the page fails to rerender leaving a large area colored in with one of the gtk theme's colors. Expected Results: The bar should merely move to the right revealing the contents of the customizable panel and the page should just shift right and render correctly. Build Date & Platform Bug Found: Linux Build 11/11/99 Additional Information: This may be a duplicate since it seems so obvious, I can't find it in the bugzilla database so just check before going to too much effort. Basically the just seems like the page is not properly refreshing. This is not always reproducable. I did find that it seemed to be loosely correlated with the size of the browser window in relation to the page being displayed--i.e. if the error wasn't reproducing sometimes resizing the browser window and then going through the reproduction steps would cause it to fail. Though sometimes this didn't seem to matter at all.

Setting QA Contact and component.

*** Bug 18709 has been marked as a duplicate of this bug. ***

Downgrading Severity to major. This does not qualify as a blocker or even critical. It is, however, very annoying. Steve can, and should, we fix this for M12?

Marking a regression. I doubt I am the proper owner for this bug, but I will try it investigate it some more.

Moving to M13.

As far as I can tell, this is a duplicate of 22214, "Sidebar blank after open/close." *** This bug has been marked as a duplicate of 22214 ***

[bugday] verifying as duplicate. sidebar rendering problem.