I've also had issues with a slightly unresponsive touchscreen on my Nexus 7. Touches that (based on smartphone experience) SHOULD have registered, don't.
Separately, and more seriously, this morning I flipped the screen on (after using it for a while with no issues), and the screen was completely washed out to the point where you almost can't see what's on the screen [1]. I obviously tried adjusting brightness right away, powering off and on, etc. Nothing. This seems fairly widespread [2] (lots of reports on forums etc., then again a lot of people bought it and only people with issues complain). I will be trying to tighten up the screws inside, and making sure any connectors are seated properly, but sending it back for a replacement if it that doesn't work.
I have noticed the problem with the edge of the screen not being responsive since I've had my pre-order one since 17th.
My own gripe is the ghosting/flikering that was demonstrated earlier this week or last last week. When I turn the screen on and start reading Currents, as soon as I scroll to a new page I will see the screen flicker a little bit. This is after the screen gets refreshed with new content.
Umm reading through what I wrote makes me thing it is the auto-brightness changing.
Separately, and more seriously, this morning I flipped the screen on (after using it for a while with no issues), and the screen was completely washed out to the point where you almost can't see what's on the screen [1]. I obviously tried adjusting brightness right away, powering off and on, etc. Nothing. This seems fairly widespread [2] (lots of reports on forums etc., then again a lot of people bought it and only people with issues complain). I will be trying to tighten up the screws inside, and making sure any connectors are seated properly, but sending it back for a replacement if it that doesn't work.
[1] like this: http://www.nexustablets.net/forum/nexus-tablet-site-news/650...
[2] more reports here: http://forum.xda-developers.com/showthread.php?t=1749849