accidentally connected an ultimate mechanical pipe to a neutron absorber from reactor craft and the server crashed. Not sure if it's a Reika issue or Mek. Crashlog
http://pastebin.com/mCJZpNzG

reference report for reactorcraft:
ReikaKalseki/Reika_Mods_Issues#245

edit: Reika says its on Mek's end

This was fixed in an earlier version.