My video feed from youtube was fine in Snow Leopard but choppy in Lion (audio seems ok).  Anyone else have the same issue? help...

Is anyone else experiencing video playback after installing Lion OX?  Hopefully, Apple will fix this bug.  Currently on a MacBook Pro with the icore 5 Intel processor and 4 Gs of RAM.  Also, a little annoying, about having to scroll in the opposite direction (up & down) since upgrade...

I have a 2011 MacBook Pro upon which I've been running Lion for maybe a month now.  I noticed for the first time today that an mp4 I rendered out of Adobe Media Encoder had the choppy playback in QT.  I opened it in VLC player and it played perfectly.  I rebooted into the recovery disk, ran permission repair and presto, that file now plays in QT no problem. Perhaps using VLC and/or running permission repair will solve issues for a few.
If you've never repaired permissions, it's easy.  In Lion, reboot and hold down the Alt key as it is booting again.  Choose the recover disk as the boot disk.  Choose the last option on the list, disk utilities.  Choose your main harddrive on the pane in the left (if you have several). Click on the "repair permissions" button.  It may take 5 minutes to run.  Quit Disk Utils & reboot.  Good luck.

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