Trac has overly restrictive filters for updating the wiki
E.g., updating the GoodBadISPs page produces:
Content contained these blacklisted patterns: 'http:', '(?i)(call|customer|technical).?support'
Which is not helpful since those strings already appear in the wiki and are probably valid when discussing interactions with the ISP.
Trac:
Username: heartsucker
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information