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I immediately un-installed ClickToFlash when my system froze while watching a Youtube movie with the H.264 codec, I had to perform a hard reboot.
That's a troubling problem. H.264 is played entirely through the QuickTime subsystem - ClickToFlash just tells Safari where to find the H.264 version.

If it's causing problems, you can disable the H.264 features for YouTube, and just have the ClickToFlash part enabled - YouTube will then just load the normal Flash videos when you click.
 
That's a troubling problem. H.264 is played entirely through the QuickTime subsystem - ClickToFlash just tells Safari where to find the H.264 version.

If it's causing problems, you can disable the H.264 features for YouTube, and just have the ClickToFlash part enabled - YouTube will then just load the normal Flash videos when you click.

Yes, I already did that 🙂, I re-installed ClickToFlash and will not use the H.264 codec again untill I have a clue what causes it to freeze.

I have two '264' components:
X264Codec.component placed in /Library/QuickTime
H.264.component placed in System/Library/QuickTime

Maybe it is the '3rd party' x264Codec component that causes the problem?
Well dragging it to the trash the Youtube movies no longer load in H.264.
Is there a way I can get Apple's version of the x264Codec back?
 
Snow Leopard Cache cleaner has really solved a lot of the problems I had with 10.6 and has prevented anything from popping up as of yet with 10.6.1.
 
Had no issues with 10.6.0 save for the boot-up brightness, which was fixed for me even before I upgraded to 10.6.1.

No flash crashing, no slowdown, no incompatibility with apps or extension that wasn't resolved within days, no kernel panics, no browsers crashing..

I love it all so far!
 
I wonder if it may have been Flash that caused some people to get 70-90% CPU loads from Firefox. Did anyone here have the CPU issue with Firefox after upgrading to 10.6? I do know there were some MR members that mentioned it after release day.
 
I wonder if it may have been Flash that caused some people to get 70-90% CPU loads from Firefox. Did anyone here have the CPU issue with Firefox after upgrading to 10.6? I do know there were some MR members that mentioned it after release day.

Could be. In safari, flash loads as a separate process, and I'm seeing it randomly shoot up over 100% CPU.
 
Since upgrading to 10.6.1 both the Flash and QuickTime Safari plugins have crashed on me. It was perfectly stable before 🙁
 
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