Bug 42838 – Masthead of yahoo.com disappears

• Component: WebKit Misc.
• Status: RESOLVED DUPLICATE

[Nicholas C. Zakas]

Created attachment 62316 [details]
Masthead disappearing on yahoo.com

Hi, this is Nicholas from yahoo.com. Our QA noted that in Safari 5 on Mac OS X 10.6 only, the masthead of yahoo.com disappears. Repro steps:

1. Go to www.yahoo.com
2. Move your mouse over "Mail" on the left rail.
3. Click the "Open Quickview" button.
4. Note that the masthead disappears.

Some other important things to note:

* The layer that pops up does have a Flash ad on the right side.
* The layer pops up over another Flash ad that's already on the page. 
* Our engineers narrowed the problem down to the combination of Safari 5 + Mac OS X 10.6 + Flash player 10,1,53,64. 

Masthead disappears with this user-agent:
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0
Safari/533.16

Masthead is fine with this user-agent:
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_8; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0
Safari/533.16

We've been unable to come up with a workaround for this bug and we're particularly troubled (clearly, since Search is a huge part of our user experience). It seems like there are a couple of others expressing similar problems: https://bugs.webkit.org/show_bug.cgi?id=41701, but there doesn't appear to be any movement on this. Please help. :)

[Nicholas C. Zakas]

After testing on Webkit nightly (6533.16, r63404), issue appears to be resolved. Any idea when this will get pushed out as part of a Safari update?

[Mark Rowe (bdash)]

This was fixed in r63283, which makes this the same underlying issue as bug 42230.

*** This bug has been marked as a duplicate of bug 42230 ***