Color fades when scrolling in Safari 4

Safari 4.0.3 update installed. I tried a number of times Fast User Switching, and so far the problem did not show up anymore.

Yes.

I have Safari 4.0.3 and do have the "color fades when scrolling" bug. The color restores if I move another window in front of the faded window.

I have upgraded to Safari 4.0.3 but the bug is still there for me (and also occurs in Mail, Preview and Skim when reading PDFs, and occasionally even the Finder in column view).

I find that the problem can take a day or two to recur after quitting and restarting the affected software or after a full restart. For those who have found the problem has been resolved by the Safari upgrade, I wonder if that has been a permanent result?

I had to have the motherboard on my Santa Rosa MBP replaced a while back due to a known hardware problem with the Nvidia GeForce 8600M GT <http://support.apple.com/kb/TS2377>: it would cause jittering of the pixels when windows were scrolled. It seemed like a strange coincidence that I'd be affected by a similar scrolling-related bug later. But testing at an Apple-certified repairer couldn't show any hardware fault in this new case, when it did pick it up for the old pixel-jitter problem.

So I think this is a software fault, but not restricted to Safari. Perhaps it is Webkit or some other system-wide component, as I see the same bug in other software too (but not as commonly as in Safari), mainly Apple software (Mail.app and Preview.app) but also in third party software (Skim.app PDF viewer).

I was just about to post to my other thread on this topic that I thought maybe it was solved with 4.0.3, but it just happened again to me after several FUS switches between three user accounts using very different ColorSync profiles.

Ans still this thread is marked 'Solved'

I STRONGLY urge those of us still having issues on this topic to use my other thread that is still marked as 'Unsolved'

http://discussions.apple.com/thread.jspa?threadID=2069711&tstart=0

Hi Michael,

Your issue sounds unrelated to the Safari bug that is solved by 4.0.3 because it affects applications that clearly don't use webkit (Finder, Preview, Skim). I would suggest searching for similar cases or creating a new thread. A couple quick troubleshooting steps I would suggest are checking to see if the same problems exist with another user account and to boot from the install DVD or another hard drive and see if the problem still exists. These both should help determine if the issue is hardware or software.

Good luck,
+R

Ryan,

Not sure how closely you've paid attention to the reports in these threads; Michael is not the only person seeing the same video/grayscale/stratified effect occurring in applications other than Safari; the common thread for those of us seeing it in more than just Safari, is that it definitely also occurs in Safari.

Our supposition is that it is not just about WebKit, but related to Core Graphics, as well, and is triggered by FUS, Screensaver-lock-login and possibly ColorSync, as well.

Most of us have elucidated our repeated efforts to try with a virgin user, and some of us have even fresh installed the OS to test. The only absolute solution is to downgrade to something under 10.5.6, and Safari 3.x; the problem became widely reported with 10.5.6 and Safari 4.x final (not beta).

(To your suggestions to boot from Install DVD, I have never been able to use Finder, Safari, FUS, etc. while booted fromt he Install DVD in the history of OS X; do you have a special DVD which allows you to run as though from a full install on HDD? I would be interested to know how to get one; they would indeed be very useful for troubleshooting and other utility tasks.)

For those of us using multiple screens, we have at least one effective workaround, which is to move the affected windows, be they in Safari, Entourage, Finder, or other apps, to a second screen, then back again. The issue will stay resolved until one uses FUS, or allows screensaver to force a password login again, when the problem almost always reappears instantly at that point.

Thanks for your input.

I'm having this issue as well, on a Mac Pro with dual displays. It appears that the contrast is increasing on windows as I scroll down, but is unaffected when scrolling up. Unlike other posters on this thread, I wasn't able to resolve the issue by moving the window to the other display. It seems that the WebView object is sending an invalid command (via the window controller) to the window server, leading to the corruption of color settings and even causing other windows to draw improperly. This is possible, since Mac OS X still hasn't advanced past cooperative multitasking for managing the GPU and video RAM. The fact that switching logins or displays provides temporary relief doesn't necessarily mean doing such is related to the cause, however it should aid in isolating it.