I have a 2012 rMBP and both a Dell monitor I connect via VGA, and a Thunderbolt monitor that I connect with via Thunderbolt. When I disconnect from these monitors, however, if I had a program open when it was connected with the external monitor, when I disconnect, it shows up as a non-retina app on just the retina screen. This makes it look like crap. Any idea why it does this? Thanks!