Yeah, T fires all all available guns straight forward (or at the angle the turrets happen to be at) or at the target, if there's any selected. Only the minelayer corvette made the game crash when I pushed T in it.
Another thing I noticed was that mothership class vessels (r1 and r2 motherships, bentusi tradeship and p2 needleship, didn't test the p1 one but I guess it's the same) spin uncontrollably when told to rotate left or right, either through mouse or keyboard input.
Finally, it would be great if ships were bound to their Turnspeed value from their ship file. In-game physics seem to limit them to maxspeed and maxrot values, but maxrot is 10 for pretty much every object, which is really really high.