Using CLISP with SLIME updated from CVS as of 21 June 2004, symbol completion coaxed by M-Tab (`slime-complete-symbol') no longer produces anything useful.
If I type
(with-o
in a buffer in SLIME mode connected to a CLISP repl and hit M-Tab, SLIME reports in the minibuffer
[Can't find completion for "with-o"]
and refuses to either complete or suggest completions for the partial symbol. This used to work as of about two weeks ago, but I can't recall when the exact last time I tested this was.