hmm, looks like i was careless and assigned the wrong vertex shader to the "littlebear_griff_monkbranch_turret" object, i think the fix is to edit the oxp's shipdata.plist, go to line 201 and change it from
if you make this change then remember to start next start oolite holing down the shift key on your keyboard until the spinning cobra appears to force oolite to clear out it's cache of oxp data and re-read it all in again (so it notices the edit)
I'll update the oxp and re-upload it too, good spot Switeck! i think that bugs been there for ages.