First of all, sorry for the delay in looking at this, I've been on some holidays... and playing too much MekHQ AtB (blame GenGame for leading me astray!

)
Kane Kaizer: which mod were you playing with? You've got a non-standard "GTD Kaizer" in your pilot file which is stuffing up my attempts to reproduce your error

1) Please post your fs2_open.log file. Instructions on how to do this can be found
in this post.
2) Can you give me a download link for the mod? Or reproduce the error without the mod enabled?
Sacro: still looking at your pilot file, hopefully I'll have some info for you soon
markoshark: could you please attach your 3.6.18 & 3.6.19 pilotfiles to this thread?