Thread:Project:Support desk/Problems editing pages and logo/reply (7)

Have a look at

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=694473

that bug seems to be what you are experiencing. Have you tried to stop and restart Apache? As far as I understand, using

apachectl restart

breaks thinks,

/etc/init.d/apache restart

fixes the problem temporarily.