Quicktime Help! (Blinking black bar issue)

Hi there,

I just purchased a Dell Studio XPS 1640 with Vista Home Premium 64 bit software. I downloaded the latest itunes and quicktime to my computer. After installing, I play my m4v's and mp4's and I get this blinking black bar on the bottom of the player itself. It spans across the whole player (not the computer screen) and about 2 inches in height. Any ideas? Help!

Version downloaded: 64 bit version of itunes 8.1.1 (included quicktime 7.6)

Errors: There was a corrupted file error upon original startup of itunes 8.1.1 but I did not play any videos at the time. Once I noticed the blinking black bar on quicktime and itunes I immediately uninstalled and downloaded the itunes 64 bit version again. Still the issue occured, but no error upon start up like the previous install.

With more investigation, I found a solution, though I don't know what it means, but it stopped the blinking black bar!

What I did:

On QT player it self I went to:

The top menu tabs and clicked "edit" next to "file"
click "Preferences" then click "QuickTime Preferences"
click the "advanced" tab under QT preferences.
Halfway down on the advanced tab you'll see a section heading for "video"

You'll have options for Safe Mode or DirectX. You could enable safemode which got rid of it or you can disable Direct 3D video acceleration under DirectX.

Now why this worked I'm not sure, possibly someone out there could answer that for me? :D I have an ATI mobility Radeon HD 3670 vid card with 512 mb of ram. My vid card has the latest drivers.

Anyhow, maybe this could help someone else? Who knows! but that's what I found!

I'm trying to resolve my own issue of the Black Bar with Quicktime embedded Web videos. Is this still a problem with Quicktime and 64 Bit Windows? I'd really love to find a fix that gets than control Bar Back. You'd think Apple would of fixed it by now. 64 Bit OSes are not the minority anymore.