[thefrog]

I've only seen it on a handful of titles.

Frozen and Gravity are two that definitely had it. Oddly with Frozen it only started showing up after the movie played fine for 1 hr. I will do a hard reboot on the box to see if Gravity still fails since I've tried all sorts of video settings and it still has the macro-blocking green fuzz whenever I play it on FTV.

• I do Full BD ISO (from BD's I have purchased mostly from amazon), but I haven't ripped anything since Mid-2012 (yes, I have a backlog).
  
• I have about 26% BD's that are VC-1 (41 VC1, 113 hdmv)
  
• I have no AVR, so all audio is downmixed to Stereo
  
• My eyeballs are not sufficient to notice the 3:2 pulldown
  
• I run Gotham RC1 (not upgraded yet)
  
• I run SMB off a FreeNAS over Ethernet (Plan to test NFS when I have time)
  
• I _was_ running MediaCodec, I have been testing with libstagefright recently
  
• Only MediaCodec glitch I was able to capture-reproduce was this: https://www.youtube.com/watch?v=fK5TiehvnxA
  

With some of the nightlys and earlier versions while opening BD ISO files and then stopping almost immediately (to populate media info) in succession, XBMC would exit frequently and sometimes render the AFTV unable to play Amazon or Netflix video until a reboot. I have not seen the green fuzz yet, but I'd be willing to compare. The machine that has the BDROM drive is in storage (why do I find that funny?) -- Otherwise I would test 'Gravity'. Is the green fuzz mostly newer movies?

Have you been experimenting with the BluRay Menus?

Side Note: do you have a link for your NAS build?