shell command completion gone

[prad]

when i do M-!, type a few characters and then press tab it used to
complete. suddenly it doesn't anymore. the only thing i can think of
having done is that i reinstalled icicles from the site (not my arch
distribution), but i don't see what that would have to do with it,
because it doesn't use icicles afaik.

if i go into a shell, everything completes just fine.

what does completion depend upon for the shell command?

-- 
in friendship,
prad