Selected Test Results (selected in 'Test Results' table below)
So far, everything I tried in SP. :)
What does not
I had a crash while changing some options during game. I couldn't reproduce it, so it could have been simply a random problem.
What was not tested
MP (I'm not really into that)
I never use "clean" prefixes. I only have one, and is where I install everything. I'm running Civ V, Skyrim, Mass Effect 1&2... so, if anything I installed for those (and the other 50 or so working games) is needed by EYE or not, I really don't know (not that I care too much either). The game also runs flawlessly in 1.5.18, so if you are using that version instead, you'll be ok. :)