This is expected. Every screen with an A-TW polarizer shows a similar effect on very dark images (slight red and green hues at the corners). However the benefit of the A-TW polarizer is well worth it. Without it, you get glow like the monitor on the right shows. Both displays are IPS displays in this case - but IPS displays w/o that A-TW polarizer have really strong glow on dark screens when not viewed head on.
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In the past, A-TW polarizers were only found on super-high end displays (NEC 2490 and 2690 for example). Currently the only monitors with them are 24" and cost more than $2k (HP 2480zx for example). Most companies dropped them due to cost. It's not a feature you want to lose.
Even at much smaller angles it makes a pretty striking difference
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