I got mine from OcUK, arrived yesterday - first impressions very good.
This morning I moved around all of my PCs, monitors, to accommodate the new 2209, when I next used it the picture was flickering intermittently, and when adjusting the panel angle/height, blocks and lines appear flash on and off the picture. It was even doing it without a PC attached, so not the graphics card or cabling.
The problem seems to have almost disappeared after leaving the monitor on all day, but this is definitely one I'm going to exchange via Dell - just hope the service is good!