It seems like the regexp library used in 1.3 doesn't know 
assertions. Was it discussed to used something more powerful?
PCRE comes to mind...

Also, the two manpages in the source distro are very terse
and don't look very up-to-date.

I found this out when I realized that 
RedirectMatch 503 ^/(?!foo|bar) 
makes Apache fail to start with "Regular expression could 
not be compiled."



____________________________________________________________
Cynic:

A member of a group of ancient Greek philosophers who taught
that virtue constitutes happiness and that self control is
the essential part of virtue.

cynic@mail.cz