Canon 5D3 - Dropouts - I'm getting terrible dropouts using Transcend 1000x cards (any card). Help!

[mjroddy]

Sorry for the dramatics...
My camera, my lovely Canon 5Dm3 is randomly and occasionally inserting nasty dropouts. I didn't even know that was possible on solid media!
I'm using Transcend 1000x CF cards, but periodically, I get a really nasty glitch that ruins much of the take.
I couldn't figure out how to embed or attach an image here, so I put an example of my take-ruining glitch up here:
http://matthewroddy.com/5d3/5dm3-dropout001.jpg (please don't mind that this take is out of focus, that part doesn't matter in this part of this take).

I was using IPB 1920p24.
The glitches are all over several takes. Most, in fact. But I can't find anything consistent that might help me understand something *I* may have been doing wrong.

What's additionally odd is the glitches appear different depending on how i'm viewing them: QT, WMP, PremierPro CS6, etc.  Each give a slightly different twist on the glitch.
Does this bit of badness mean a bad sensor, bad media, bad processors, or what can I possibly do about this?

[TCampbell]

Hit:  Menu -> Yellow wrench #1 -> Format card -> pick the card (1 or 2) -> and use the trash can button (lower left corner on the back) to toggle the "low level format" checkbox either on or off as you need.)  -> then click "OK"

[mjroddy]

Thanks again, Tim!

However, that doesn't seem to work on the CF card (slot 1).  I can only bring up the "low level" checkbox on the SD card (2).

I did read earlier that Canon won't let you low-level format the CF card (forgot which forum I found that on now).

Does your 5D III allow you to format the CF card?

[TCampbell]

Ah!  You're right.  The "low level" checkbox only appears for the SD card... not the CF card.  I had never noticed that before.

[mjroddy]

You've been a big help to me, Tim.  I really appreciate it.

LAST question (I hope): If you were to format the card in a PC, would you uncheck the "Quick Format" checkbox?  Also, NTFS of FAT32?

I'm being hyper-sensitive here because these problems have caused me SUCH headache and could have cost me a lot. 

I'm looking to avoid all such issues henceforth and forever more.

Thanks again, Sir!