I just checked out latest repo, seems to be fixed now, somehow.

Sorry for the noise.

2010/7/30 Stas Boukarev <stassats@gmail.com>
Gustavo <gugamilare@gmail.com> writes:

> Hello,
>
> I think I found a bug. Emacs freezes every time I input ":something <TAB>" in
> Slime REPL, i.e., whenever I try to autocomplete a keyword from the REPL. It
> also seems to happen in other buffers as well. Autocompleting "normal" symbols
> seems to be working fine.
>
What completion are you using? (C-h v slime-complete-symbol-function)

--
With Best Regards, Stas.