Not sure which is the best place to report bugs of Certus' modules. In m_tkl_export.c, if all the Mod_* functions could return MOD_SUCCESS, this crash bug would go away with some compile-time warning messages and a run-time error message ("error loading module tklexport") as well. (Returning MOD_SUCCESS is especially required in Mod_Load. If that returns an other value, UnrealIRCd will unload the module, and because Certus hasn't used CommandAdd to add a new command, Unreal believes /tklexport is still present, that's why it crashes.)