One thing I'm wondering is if it's hitting a length restriction on the mod line. Get the 3.6.10 RC2 build and run the debug inferno build. Better yet grab Zathras since it's in there. Post the fs2_open.log. Also is it possible for you to email me the modded ships and table entries for them or at least the table entries? If there is a problem I'd like to find out sooner then later.