This first one occured in the last official release, I mentioned the bug to Goober but it seems nothing has been done about it:

The grids are fine in FRED2 and were fine in earlier versions of FS Open, however they're now broken.
The second problem is AI related, as soon as I downloaded the current build ships seem to "twitch" as if they have Parkinson's disease.
I set a ship to follow a waypoint and instead of following a ballistic path it twitches slightly (appearantly as if it was beginning to do an attack run and then stops) when under attack. Very annoying.