In the DM Reference, ckey() is documented as so:
Returns: The key in canonical form. To do this, it strips all punctuation and space from the key and converts to lowercase. The result is still unique for each different key.

I think this should be documented to update the change in ckey()'s behavior per version 327 (ckey does not strip the '@' character). I imagine that the lack of documentation here could cause several errors on users' behalves.

Hiead