A member's collection page (I'm taking Noah as example) is referred to correctly as
http://twistypuzzles.com/cgi-bin/cm-view.cgi?ckey=420
within the Site Features --> Member collections,
but is referred to
http://twistypuzzles.com/cgi-bin/cm-view.cgi?id=420
in the Forum Memberlist ( memberlist.php )
under "website" if the member's "website" is the Twistypuzzle Member Collection,
giving an "There aren't any items in this collection yet." error.
This (changing 'id' to 'ckey') can surely be fixed without much ado.