As well as missing screws, mine had no adhesive whatsoever holding the main assembly to the display. (I purchased my 1st gen Nexus 7 in the last month before the 2nd gen came out, so I'm guessing it was likely one of the last few produced. Perhaps that's related to the peculiarities?)

Interestingly, my Nexus only had 11 3.2mm Phillips screws. (#3 and #5, counting downwards along the right side, were missing.) Did someone drop some on the assembly line? :-)