Hi, I reported this bug a few years ago, but it is still there. If both AT BEGINNING and RESULT-TYPE are specified, RESULT-TYPE is ignored. Example: (iter (for i below 2) (collect i at beginning result-type vector)) returns (1 0). Can someone with write access to the darcs repository fix the bug please. My previous report includes a patch: http://www.mail-archive.com/iterate-devel@common-lisp.net/msg00142.html Thanks, Ilya