Hi there,
I think there is a bug in slime-fuzzy-complete-symbol. Here are steps to reproduce:
1. (setq slime-complete-symbol-function 'slime-fuzzy-complete-symbol)
2. M-x slime-describe-function
3. lo TAB TAB
After step 1, 2 and 3, the minibuffer takes up half of the screen as in this screenshot: http://imagebin.org/49185.
This is tested using slime 2009-04-03 and
GNU Emacs 23.0.93.1 (i386-apple-darwin9.6.0, NS apple-appkit-949.43) of 2009-05-09 on neutron.local
Bye,