so i've seen this problem from time to time and finally got it captured on video.
it seems that when parallels starts, even if it's not the foreground window it still captures the keystrokes in any mac-side window.
here's the video link on youtube...
watch the background window (parallels / visual studio) as i type in mac's spotlight search box and safari's address bar. one i return to parallels and then have it lose focus it goes back to normal.
parallels desktop 7.0.14924
mac os x lion 10.7.2
Last edited: Nov 16, 2011