Macbook Pro external monitor maxes out at 1360x768 I have a 13" MBP with a mini DP to VGA. I have it hooked up to my new Samsung 23" display that has a max resolution of 1920x1080, but it seems that I can't pick a resolution higher than 1360x768. The adapter is from CablesToGo and states that the max resolution supported is 1920x1200 so I should be fine.
Note: I've tried on 2 MBP's and the resolution is the same on both.
Turns out a reboot was necessary for it to display correctly.  Once that was done all is good in the world again.

NOTE:
Was never able to get this to work properly with a VGA adapter - a reboot is always required.  The only solution was going to HDMI.