Last night I enabled FileVault of my nMP because of recent security issues here. Anyway, point being after I did so my Mac Pro started having problems with the displays. Mainly, my desktop background would change to one I haven't used in months on my primary monitor, but the one on my 2nd monitor wouldn't change. The FileVault login (which happens earlier in the process) now takes place on the 2nd monitor instead of the primary monitor. Even before FileVault, the Apple logo would show up on the 2nd monitor instead of the primary. Note that I had a similar problem with my 4,1->5,1 oMP when it was my primary machine. Any ideas as to what I can try? I have tried SMC and PRAM resets, checked the disk permissions, ran Diagnostics and tried SafeBoot to no avail. Thanks! Primary Monitor: Dell ST2421L connected via HDMI 2nd Monitor: 20" Apple Cinema Display connected to Thunderbolt port via Mini DisplayPort to DVI adapter.