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Since I updated to 10.6.8 yesterday (and this might be coincidence), both Quicktime Player (I still use 7) and VLC (current version) keep stopping the video (but not the audio) of movies I am watching. This happens whether they are in the background or fullscreen and fixes itself when the program gains focus.

Is this a faulty video driver that came with 10.6.8 or what could be the reason?

Mac Pro 2009 2x2.26 GHz, 24 GB, ATI Radeon HD 4870.

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This is still ongoing. And I remember that it happened before but went away again. – Andrew J. Brehm Aug 6 '11 at 14:20
Yes, even for me on a fairly fast MacBook Pro 2.3GHz i5 (10.6.8) Rendering some edits in After Effects, they play perfectly fine, but once I export them, the players stutter and pause for an uncomfortable amount of time before eventually resuming. – user20623 Mar 23 '12 at 18:46
Everything started working again a few months ago. Still don't know what it was. – Andrew J. Brehm Mar 23 '12 at 21:53

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