In ZWEI in MIT-Specific 18.1, System 93.30, ZMail 49.10, microcode 226, gc@2, on Lisp Machine Nine: I did C-X C-F and it prompted with OZ:PS:<HACTRN.SOURCE>FMACS.LSP. I typed SS:FORK, expecting it to complete to OZ:SS:<HACTRN.SOURCE>FORK.LSP, but instead it completed to .LISP. That's not the behaviour I want.