This just started (I haven’t tested this since before the last patch), but when you are running windowed Fullscreen mode and you hotkey swap from spanned to eyefinity mode GW2 crashes to desktop. If you switch from Eyefinity to Spanned mode, the game does not crash.
I am running 3 1600×900 monitors, eyefinity resolution of 5040×900.
Its more of a minor annoyance, but this didn’t happen in the past (at least before the last patch)
Crash Log is attached at Txt (too long to post in a single post).