After upgrading to FCP X 10.1 all preview clips don't play correctly and stutter.

If I select,"Show Views on Second Display" everything works fine previewing clips.

I actually have six monitors and 4 of the 6 display FinalCut playback fine. For some reason the middle to monitors which on a single graphics card having stuttering issues. I'm gong to switch them up with another card.

Very odd, considering all the cards are identical.

I re-arranged video cards, it makes no difference. If I have FCP X 10.1 on any other screen, than my main screen it works fine. As soon as I drag it to the main screen the preview of clips malfunctions.

I made a second user account and got the same result.

I tried creating a new Library and imported test footage and the same thing happens.

I also have Motion and Compressor installed.

I really don't have time for a format/re-install.

Any suggestions on possibly nuking everything video related and re-installing?

This is the craziest non-sensical issue I've ever encountered on a Mac.

I have restored Mavericks back to 10.9 and upgraded FCP X, Motion, and Compressor to the latest versions and everything seems to be working fine now.

I'm going to run a full backup before upgrading Mavericks this next time.

One thing i've noticed is that this state is before I installed DivX. Maybe that might have been the cause.

After doing a full re-install of everything again, the problem still persists.

This is a Final Cut Pro X Software problem. Where do I report a bug?