As I don't remember all of those who were interested in more bug fixes, here a note. Hopefully I will catch all that are still using D2X.
I have managed to pin down the bug causing the reactor to turn into a Medium Hulk (brownish, two armed bot shooting concs). This bug has very likely also been causing spurious game crashes after destroying the reactor and heading for the exit.
I will upload a new version of D2X in a few hours.
There is also an updated version of DLE-XP available on my Descent site.