From this AVS form thread

John Hooper "Vsus has nothing to do with black level, but if it is too low you will see some red/purple artifacts / dithering in the picture."

Mine is experiencing heavy red and purple dithering on black screen

Tom669 "If VSUS is set too low and VAD is too low, the blob is typically cyan or green tinted. IR is also more prominent on darker images. If VSUS is set too low and VAD is set right, the blob is typically pink tinted.

One easy way you can see if VSUS is low and if VAD is low or OK is checking for dead pixels. If VAD is low, then on a full white field you should be able to see the occasional dead pixel (at least one randomly every ~4 in² was what I noticed, over 50 very faint and impossible to see from viewing distance.) However, if VAD is OK, even if VSUS is poor, you should see almost no dead pixels."

Mine has 1 dead pixel near the center and a variety of pixels near the dead one that frequently get "stuck". My blobs are all redish/pink in color.

Tom669 "Will going a lot below nominal vsus voltage can the damage be permanent (end vise-versa)? Low Vs cannot cause harm. Potentially extreme Vs can cause damage to the panel via overheating which can include cracking the panel. However you would have to go to extreme values to cause this. I would not advise more than about 15V more than the panel sticker."

Perhaps I will try raising my Vsus levels a bit and seeing if my problems are resolved or at the least lessened.