Yes, i was aware of that. What i find slightly confusing is the fact that
typing a \( while in completition mode will happily insert the character
(actually, it 'll insert both \( and \), but that's a feature of paredit)
and still stay in completition mode. But I'll have a look at the code as
soon as I can spare some tim

this can be configured like this:

(define-key slime-target-buffer-fuzzy-completions-map (kbd ")") 'slime-fuzzy-select-and-process-event-in-target-buffer)
(define-key slime-target-buffer-fuzzy-completions-map (kbd "(") 'slime-fuzzy-select-and-process-event-in-target-buffer)

--
- attila

"- The truth is that I've been too considerate, and so became unintentionally cruel...
- I understand.
- No, you don't understand! We don't speak the same language!"
(Ingmar Bergman - Smultronstället)