Color fades when scrolling in Safari 4

I disagree: it would hardly have to effect all users, as the software bug may only be applicable to certain hardware configurations. I'd never experienced this problem until I installed 4.0. Repairing permissions only fixed the problem temporarily. Dragging the window to one screen and back to the other fixes the problem, which recurs every time I use Fast User Switching to lock the screen or put the laptop to sleep.

I haven't tried repairing the disk yet.

As I said before the other way to fix it but it seems temporarily is re-setting Safari and trashing the safari preference file plist. Also it is so erratic when the problem start or goes away. Some days don't happen at all and I am sure I didn't change anything. and some days the problem is constant I finally start to use firefox browser that I don't like personally. I sent the bugs reports also countless times. I really thought it would be fixed with the 4.0.1 version these are not PCs machines I paid over 3K for my machine I don't care if no many people have the problem or not I do and the reason I use Apple is because they have the tendency to fix problems like this one if not I pay 800 bucks for a dell.

I've tried repairing disk permissions and disk and it didn't help. Also there are no application enhancers installed. There is no rule that a bug should affect all users, it can be triggered by a limited combination of reasons.

To be fair, it may indeed impact all users who are using a 2nd display and Fast User Switching but measuring it is difficult. For example, I thought I was simply going mad for a while before doing a search online and tripping over this discussion. It's a bizarre bug but one that does seem to require specific circumstances to manifest itself but once known it can be consistently reproduced. I'm sure that 2nd displays are very common but the use of Fast User Switching is probably less so. Personally, I simply use it as a secure form of locking my system while I am away from my desk but others may simply use screensaver passwords to achieve the same.

Agreed: I at first thought I was going nuts, too. Then I thought my monitor might be dying, as it's old. I finally noticed the problem was endemic to Safari, and only then found this thread.

People are jumping to a lot of inaccurate conclusions here. As I posted a number of pages back, I was having this problem last week on my Macbook Pro, but it was (mostly) fixed by repairing permissions. I have NEVER USED A SECOND MONITOR and DO NOT HAVE FAST USER SWITCHING enabled. Still, I was having the color fade when scrolling. Repairing permissions did fix the Safari issue, but I then had the same color fading in my Finder windows when scrolling. A restart fixed that problem, and things have been fine since. This is a bug that does not have an identified cause or fix at this point

Interesting. Had you installed any version of Safari 4 at the point you had this problem? Is anyone else having this problem on a single-monitor setup or without FUS enabled? I've never seen this with the Finder at all? How does it manifest itself there for you? Just scrolling through windows? Visible on the desktop?

As far as not having Fast User Switching on or a second monitor, you're a statistical outlier from what I've read in this thread. Very strange.

I also have this bug.

Early 2008 MacBook Pro, 30" Cinema Display, and I use fast user switching frequently. Bug only occurs with Safari 4.0 and 4.0.1 final, it did not occur with any of the beta versions of Safari 4, nor have I noticed it in any other application.

Repairing permissions does not fix the problem, but dragging the browser to another screen and back stops the problem temporarily.

yes, i had been running the Safari 4 beta since the day it was released, without a hitch. about an hour after installing the final Safari 4, problems started. i was having the same safari issues as others report, but once I repaired permissions, no more problems. The Finder, however, then started acting goofy. No color problems, but as I scrolled down a long open window, the text started getting very blurry and pixellated. weird. As I said, a restart fixed that, and no problems since.

"But it is not experienced by more than a few users"

That's true.. if you add "in my office" to the end of the sentence! We are probably 10-12 Mac users here at work who have upgraded to Safari 4 Final (and now to 4.0.1), and there are four of us who have experience this bug daily.

I do agree that it could be another piece of software that does the damage, but that would require all of us to list all the software/add-ons/widgets etc. here to find the culprit, wouldn't it? From Safari 4 beta to Safari 4 final something went wrong, and I'm pretty sure that Apple's engineers would be able to tell what kind of code could trigger this bug.

I'm inclined to suggest that the conclusions are "incomplete" rather than "inaccurate". It seems that you have found another means to trigger this behavior but I am absolutely 100% certain that you can reliably reproduce this bug by connecting a second display and making use of Fast User Switching. Repairing Permissions doesn't make any difference and I have no issues with the Finder, which makes me think that what you are seeing is something slightly different.

For me, dragging the Safari window to the 2nd display and then back again resolves the problem until the next time that I use Fast User Switching.

Okey, didn't work for me at all...

MacBook Pro, GeForce 8600M, Fast User Switching enabled. Worked fine in Safari beta.

Do you have a 2nd display connected to your MacBook Pro? If so then you can temporarily stop the problem by dragging the Safari window from one display to the other and then back again. This solves the problem for me until the next time that I invoke a Fast User Switch.

For me it doesn't become dark, but white.
I do use 2 monitors + FUS and I have very few programs installed:
Address Book.app
AppleScript
Automator.app
Calculator.app
Camino.app
Chess.app
Colloquy.app
Cyberduck.app
Dashboard.app
Dictionary.app
DVD Player.app
EmailCloaker.app
EPSON Scan.app
Exposé.app
FinkCommander.app
Firefox.app
Font Book.app
Front Row.app
Gimp.app
HexEditor.app
iCal.app
iChat.app
Image Capture.app
iMovie.app
Inkscape.app
iPhoto.app
iSync.app
iTunes.app
KompoZer.app
Mail.app
MAMP
Microsoft AutoUpdate.app
Microsoft Office 2004
OmniGraffle.app
OmniOutliner.app
Open XML Converter.app
OpenOffice.org.app
Photo Booth.app
Porticus.app
Preview.app
Q.app
QuickTime Player.app
Remote Desktop Connection.app
Safari.app
Seashore.app
Smultron.app
Spaces.app
Stickies.app
Sunbird.app
System Preferences.app
TextEdit.app
TftpServer.app
Thunderbird.app
Time Machine.app
Transmission.app
unaceX.app
UnRarX.app
Utilities
Virtual PC.app
VLC.app
Wired Client.app
Wormux.app
xDonkey.app


*My Safari Plug-ins*:

Flash Player.plugin
flashplayer.xpt
JavaPluginCocoa.bundle
NP-PPC-Dir-Shockwave
nsIQTScriptablePlugin.xpt
Quartz Composer.webplugin
QuickTime Plugin.plugin
QuickTime Plugin.webplugin
VerifiedDownloadPlugin.plugin
VLC Plugin.plugin

I am also experiencing this problem on a MacBook with external screen. Repairing permissions and resetting PRAM only helps for a short while 😟 Hope this will be fixed soon!