I put together a quick AppleScript to get the window back without reverting:

tell application "OmniFocus"
	tell window 1
		set bounds to {50, 50, 850, 850}
	end tell
end tell

It will collapse again if you try to resize manually, but then you can run the script again...

Mike

[ext555]

thanks , that one bit me today too , sent feedback to omni

[CNY]

me, too. though the script didn't work for me. sent feedback.