Playing a custom Wraith faction. Was making an archer unit with the Hallowed Rite ability.
Debug.err link: http://pastebin.com/index.php?e=1
ZIP file Link: http://dl.dropbox.com/u/9336846/FallenEnchantress0_77-2012-01-28T16-48-09-224.zip
Started the game back up, and designed the exact same unit, and did not crash this time.