#/ in titles are broken in pretty URLs
When you have an article with # or / in the title, and you have pretty URLs enabled, the wiki cannot find these articles, because everything after the # or / is cut off. Using the normal (non-pretty) URL works as expected.
This is fixed by flagging pretty URLs in .htaccess and allowing PHP to handle converting the variables to proper URL format. Fixed in the next build; specific Rewrite Rules will have to be used.
Code:
Rewrite Rule ^vault/(.*)$ showwiki.php?pretty=1 [L]
Replacing the "vault/" to correspond with your own paths. As mentioned, this rule will not work properly until the next build.