Wierd Pixelation Issue

I have pixelation on my TV.  It is coming from FIOS, as it does not appear when we are watching DVD's or Roku.  As a matter of fact, it does no happen in FIOS menus, only when watching live TV, recorded programs, or on demand.  There is a band, about 1/3 of the way down the screen, 3 inches wide, that extends half way across the screen.
Any ideas what may be causing this?  (Sorry the picture is bad)  the pixels do change colors, they tend to bbe the oppsosite of what they should be (white when they should be black etc)
Mike

Same Exact Problem here.  Notice it on HDMI and component outputs when I get it.  You do not see it when streaming.  Restarting box gets rid of it on mine.  I have had it three times in the last 3 weeks.  Trying to figure it out myself because I do not want to replace box because I have many, many shows on external hard drive, Through trouble shooting, I am leaning towards external hard drive/esata cable.  I do not get it when external drive is disconnected.  One thing I am currently testing is a shielded esata cable, being so close to the HDMI cable\port,  I do not trust the esata cable I have. Going to swap HDMI cable also. Something messes up the output.  I will let you know results.
For people having similar issues and troubleshooting, here is what I am using:
7232 DVR
2gb external drive (Non-WD/Seagate Pipeline)
HDMI primary output
Use Close Caption a lot  (Casual font)
If you are getting a similar problem, please post your equipment.  I would like to see if any common thread.
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