Internal error: Turreted Amphibious APC on water Options

[KajiTetsushi]

I was just playing around and pushing the envelope with TS's game logic to see how far it can really go when I noticed that adding the following to the rules.ini returned me an internal error when the vehicle was instructed to cross water.

CODE

[APC]
Name=Amphibious APC
Turret=yes                  ; the troublemaking tag
Primary=120mm               ; example weapon
; ... the rest of the default game settings ...

I've read and understood that the game engine is hardcoded such that the only unit with a separate submerged voxel is the [APC] (for those who don't know yet: it's under aapc.vxl and aapcw.vxl in the local.mix subfile in TIBSUN.mix), but I don't think Turret=yes has anything to do with this!

Please enlighten me.