Precisely what I'd been thinking all along too...
I didn't want to obfuscate the debate with the dirty word 'pentile', as there's so may misconceptions around it.
I can't find the other good articles ATM, but as I recall this one wasn't too bad.
http://www.tested.com/news/pentile-v...ifferent/1868/
Should only be an issue when you look real closely, & particularly for small text up-close.

*edit*
Actually I re-read the original post, & your 1st issue sounds nothing like what one would get thanks to a Pentile AMOLED.
Those picture you posted more recently look kinda symptomatic of Pentile AMOLED, but you reckon you only get that as per outlined in your "2nd issue".

That second issue is just utterly weird...
So you can only reproduce it if you empty the browser's cache, delete it's cookies, & lower brightness to 50%?
Can you reproduce it by just flipping the ph to landscape, & not doing those 3x other things?