AE CS6 Crashing when scrubbing .mxf footage

Question

Hi everyone,
I am using native .mxf -  MPEG-2 HD footage shot with a Canon XF300, and nearly every time I place it in the timeline or or viewer and scrub AE freezes and crashes. Non mxf footage doesn't cause AE to crash.
I am running a newly built Windows 7 64bit system
Dual Xeon 2687's
EVGA Classified SRX motherboard
96 GB RAM
3 SSD (operating system and applications on one, scratch and cache on others)
GeForce GTX580 3GB
internal 10K raptor drive (footage)
External OWC 4TB Qx2 RAID 5 / 0 (switched configurations in an attempt to resolve issue) (footage) - connected eSATA / USB2.0
I have adjusted the preview resolution settings, the preferences, the location of scratch disks, changed the location and connectivity of media hard disk, I have attempted older drivers, and ive switched video cards - I previously was using Quadro4000.  I have reinstalled the Adobe Suite, and just yesterday did a complete reinstallation of the OS. And that hasn't seemed to solved the issue. 
In the Windows event log, the error reads: Faulting application path: C:\Program Files\Adobe\After Effects CS6\Support Files\AfterFX.exe
                                                              Faulting module path: C:\Program Files\Adobe\Adobe After Effects CS6\Support Files\mc_dec_mp2v.dll
I am new to .mxf and I have only been using this footage format for a few months, however the crashing issue did not occur until about a month ago. Im not using proxies  I believe it was around the time when I applied the latest AE update.  I cant say with confidence it was the update because I also was switching GPU drivers to resolve Premiere Pro crashing.  Essentially AE worked when Premiere Pro didn't, and now visa versa.
It always catches and crashes before going into adaptive resolution.  Are the hard drives not able to keep up? 
Footage runs fine in Premiere Pro
Hardware seems to check out.
Any insight would be appreciated. 

Answer 1

I suspect you're an occasional (i.e. not full-time) AE user like me, you expect things to work as advertised, and when they don't, you're at a loss.
You have to remember this:  AE is a MATURE APPLICATION.  There is code under the AE hood that has been there for 20 years.  Adobe doesn't totally re-write the code from version to version, they patch where necessary to avoid a massive re-write.  If they did otherwise, your reasonably-priced, off-the-shelf software would be much, much pricier, and where would that leave you?
Does every such patch work each and every time?  Adobe does a lot of testing, but to expect that every possibility has been covered isn't realistic.
Here's another consideration: there are so many combinations of operating systems, system manufacturers, third-party cards, processors, etc. that can accommodate AE that it's getting increasingly difficult for an off-the-shelf application like AE to be all things to all people.  That's why you see so many threads where people ask diagnostic questions about OS, Processors, cards, media containers, codecs, AE settings, etc.  They all play a role in getting AE to work properly.
I'm not apologizing for AE.  I'm not apologizing for Adobe, either.  But given the currentl landscape, that's a just a fact of life.
If I had a big shooting schedule coming up, and I knew in advance that AE would play a big role in my projects, I would find a way to transcode my footage on its way into the computer that would cause AE fewer fits.
But that's me; I'm not a big fan of being on the bleeding edge, I like consistency.  You may approach the topic from a different point of view.