I realise this isn't the most up-to-date build (1.79.0.5515-140110-b5dc768) but it looks like the players front weapon firing point is shifting position backwards into the model depending on how fast the ship is travelling, I think this got fixed a few builds back but it looks like it's returned again.
As far as I can tell the problem isn't affecting the exhaust plumes, just the front laser
Windows 7 64-bit, no OXPs