regexp invalid range problem

[HEGEDUS Ferenc]

Hi

I have a following line in my .muttrc:

color body blue black [a-z]

This causes:

Error in /h/d/dark/.muttrc, line 98: Invalid range end

This regex only work if i writing [a-b]
Why? I tried " ' \ characters a lot. :)
Thanks.

d

Ps: Mutt 1.3.15i (2001-02-12), debian woody