It seems there is a problem since a recent apache release, I now get this at the beginning of my pages:
Warning: preg_match: internal pcre_fullinfo() error -3 in /srv/www/htdocs/dokuwiki/inc/common.php on line 697
Warning: Cannot modify header information - headers already sent by (output started at /srv/www/htdocs/dokuwiki/inc/common.php:697) in /srv/www/htdocs/dokuwiki/doku.php on line 33
This appears to be related to this changelog entry, from debian or ubuntu:
apache2 (2.0.53-3) unstable; urgency=medium
* Drop Andres Salomon's PCRE manglig patch in favour of hand-merging
Joe Orton's patch against head to completely internalise apache's
copy of PCRE, only exposing a wrapper API. (closes: #294395)
-- Adam Conrad <
adconrad@0c3.net> Wed, 9 Feb 2005 11:30:21 -0700
The bug is here:
http://issues.apache.org/bugzilla/show_bug.cgi?id=27550
Also, I do not have the latest version of dokuwiki.