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safari rendering issues

I have been getting some strange rendering issues since upgrading to OSX Mountain Lion/Safari 6. They seem to be fairly random, and happen accross multiple sites, even "big sites" like YouTube. I will get "artifacts" left behind, and I'm even getting them now as I'm typing this message with the text. Because is seems to be so "random" I have no idea what's causing it, but, it's very distracting and obnoxious when the artifacts interfere with navigation. Is anyone else experiencing these problems?

Macbook Pro, Mac OS X (10.6.6), iPod Touch 32GB (4th Gen)

Posted on Jul 27, 2012 10:21 PM

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239 replies

Jul 28, 2012 5:29 PM in response to Shawn McCuan

Hello,


I am also experiencing these rendering oddities - usually related with mouseover layer effect or exapand/collapse actions.


In addition to this, I am experiencing issues while typing text in certain form fields within Safari only. As I type, say, my username, the cursor will jump back a few position and/or not render the text I am typing. If I highlight the space, I then see the text. This may be related to the above, but I cannot be sure.


Thanks,

E.

Aug 1, 2012 8:19 PM in response to Shawn McCuan

It seems like someone tried to optimize the rendering speed by being more aggressive with dirtying/redrawing tighter regions, but the code is buggy. I too see lots of rendering issues with text while typing in a <textarea>, redraw issues in areas like Facebook (clicking to expand comments sometimes does not draw them), and increased problems with SVG dirty rects.


For example, see this demo, and notice how 'junk' is left on screen sometimes around the circle as it moves:

http://jsfiddle.net/3PfcC/


Here's a screenshot I took while complaining about the upgrade on Google+:

User uploaded file


In trying to hide the menu, it failed to redraw the page properly. And just now, typing this last sentence, the line of text flickered in and out.


It could be that this is related to the video subsystem. As noted in the screenshot above, I'm experiencing these issues on a 17" Mid-2010 laptop with Intel HD Graphics/GeForce GT 300M internal.

safari rendering issues

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