Hi! I played a new game with 1.
yesterday and noticed that the "invisible" engines are still there. sometimes the "builtin" engines of a hull are not visible and the shape is missing so you can see inside your through your ship.
I use an ATI Radeon x1600 with AMD Athlon XP 3000+ and WinXP.
(Sometimes the engine trails are only on one engine visible if there are two engines on the hull, too. But did not see it in 1.8 yet so I have to test it again.)