Color fades when scrolling in Safari 4

Well, I too have that since Safari 4.0 and the upgrade to 4.0.1 doesn't made it better. I too have two monitors connected to my Mac Pro and I use Fast User Switching.

First, I thought it could be from after I used some of the iwork apps, but couldn't clear that out til now what this can happen. Another idea was it could be from my graphics card, it is a ATI radeon X1900 which came with the early 2008 Mac Pro from Apple.

Most times I see this bug at morning after I wake up my Mac from sleep mode which it was over night.

Hi everyone. I have the same strange and very annoying "fading when scrolling" effect since I upgrade my Safari last week. The "even stranger" thing is that the slower the scrolling, the faster the fading. If I click out of Safari and then back in, colors come back to normal. It happens only with Safari (not in the Finder or elsewhere).
I have a MacMini with 1 (not 2) external screen plugged on the DVI socket. I believe no one else has yet reported this trouble on a macmini. Mine is brand new, so there's nearly nothing more installed on than what it got "out of the box". Just Gimp 2.6 and Fugu. Restoring permissions doesn't help.
Sorry for the poor technical and english quality of this report, I'm both a newbie AND a french guy...

I'm seeing this too, scrolling in Safari 4 on my new MacBook Pro 15" fades the colour on the page. Doesn't seem to happen in any other app, and colour is easily restored, for example choosing "Report Bugs to Apple..." from the Safari app menu fixes it (of course, so the "send screenshot" option is useless).

i've just done the regular update yesterday, and the bug seems to be no longer there... hurray !

Here's a workaround which doesn't involve restarting Safari after using Fast User Switching:
http://www.macworld.com/article/49522/2006/02/fuscolor.html

Refer to that article with caution: it is three years old and refers to Tiger.

well, in fact it doesn't change anything. I still have the trouble. sorry for the wrong message.

Just to throw my hat in the ring here, I too am having this issue. As said, the issue arises when unlocking fast user switching, Safari 4.0.1, Mac OS X 10.5.7, dual monitors.

I have another iMac without dual monitors and cannot replicate the issue. I think the issue has more to do with dual monitors than anything.

Same here. Mac OS X 10.5.7, Safari 4.0.1, dual monitors.

Same here. Sometimes it goes to black and white and sometimes it goes to reddish colors like in this example:

http://img523.imageshack.us/i/safari4colorrenderingwr.tif/


P.S.
A photoshop plug-in for this effect would cost a lot of money.

+1 to the user count on this issue.

Below is what I have found and observed on MY system.
Your mileage and cause my vary. Just hope this helps find the solution faster.

DESCRIPTION:
Rapid saturation or darkening of visible, colored elements (non-white) to 2-bit black and white rendering during horizontal or vertical scrolling in Safari 4.01 (5530.18) after returning from Login Window accessed via Fast User Switching (FUS).

*RELIABLY RECREATE:*
• Have one or more Safari 4.0 Browser windows open
• Have one or more tabs open to any scrollable web page with visible non-white elements
• Switch to Login Window via FUS
• Log back into Account
• Scroll the page window of open or new tabs in existing Safari Browser windows
• Oddness ensues ...

RESULTS:
• Any visible colored pixel on the page darkens toward black as the page scrolls
• Text stroke increases and pixelates (darkening of anti-alias gradients?)
• Text or visuals that go "off page" are reset but darken again when visible as you scroll

DETAILS:
• Did not occur in Safari 4.0 beta
• Only occurs in Safari 4.0 browser windows open at re-login via FUS
• Occurs in all existing or new tabs of an affected browser window
• Occurs in browser windows open on either or both laptop or external monitor
• Does Not occur in new browser windows created after re-login
• Issue builds on horizontal or vertical line parallel to page window edge
• Rapid "jiggling" - short up-down or left-right scroll of visible page can create:
... • Darkening middle (toward black)
... • Sharp linear graduation to normal at edges of page (due to "off page" element resets)

*SPECIAL NOTE:*
While composing this reply:
• Issue Occurred: When scrolling the page of this reply form with Safari scroll bar
• Issue DID NOT occur:
... • When scrolling the message text box of this reply within the form
... • When resizing the message text box
... • When resizing Compose/Preview box surrounding message text box

• Issue RESET for reply message text box ONLY:
... • By scrolling the message text box
... • By clicking on message compose or preview tabs

• Issue RESET for whole page
... • By resizing the message text box
... • By resizing the Compose/Preview box surrounding the message text
... • By Fixes listed below

FIXES (temporary)
• Page will immediately "snap back" or reset but resume immediately:
... • On Window resize
... • On focus change then return to window
... • On Selection of "Safari > Report Bugs to Apple ..."menu selection
... • On <command + R> or "View > Reload Page" menu selection

• Individual interactive elements will reset (then resume) on use or mouse over:
... • Text box scroll bars
... • Drop menu elements
... • Submit buttons
... • Roll Over images, styled links or other elements,

FIXES (until FUS re-login trigger)
• Moving browser window between external and main monitor (either direction):
... • immediately resets visible tab page of moved window ONLY
... • resolves issue on all existing tabs of moved window until FUS re-login
... • NOTE: an unmoved 2nd window will continue displaying the issue

*HAVE NOT ATTEMPTED* (others have - reporting only a temp Fix)
• Repairing Permissions
• Deleting .plist files

HARDWARE/ENVIRONMENT:
• PowerBook G4 1.5 GHz Build 9J61
• 2 GB DDR SDRAM
• OS X 10.5.7
• ATI Mobility Radeon 9700
• Connected devices:
... • DVI: Dell 2407FWP Monitor
... • USB 1: External HD
... • USB 2: Dell 2407 Monitor 4 port built-in USB 2.0 Hub
... • Hub 1: Sony Headset
... • Hub 2: Sennheiser Wireless Earset
... • Hub 3: Logitec Track Man
... • Hub 4: HP All-in-One Printer
... • Speaker Jack: 2.1 Computer speaker system

Message was edited by: Lyle Turner

Mac Mini 2GHz with mini display port and DVI has the same problem. I think the MDP is the monitor having the problem - but I didn't swap primary monitors to verify it's not just a secondary monitor thing. I'm going to file a comment on the bug #6963632

I have the same problem. Thought I needed a new monitor. In Safari 4.0.1 text and images just fade to white while scrolling. Using a dual monitor setup, without Fast User Switching on. I had no problem with the Beta version. Sent in a bug report to Apple. I am just going to switch to Firefox 3.5 till the problem gets fixed.

repairing permissions worked, for a while. the problem is back today.

and for everyone who thinks the problem has been completely identified, you are ignoring my many posts. i DO NOT have fast user switching enabled, NOR do i have dual monitors.

I have the problem here too.

IMac 3.06GHz Core 2 Duo 24-inch with 20-inch Cinema display.
Running OSX 10.5.7 and Safari 4.0.1 (5530.18).

Fast User Switching is off.

I can confirm that the problem is intermittent and that dragging the offending Safari window from the external display to the iMac display and back temporarily corrects the problem. Another thing I haven't see mentioned is that hovering over images that are links will snap them back to the correct color temporarily.