Mediawiki pretty URLs

Using mod_rewrite to prettify MediaWiki URLs as described in the Dreamhost wiki breaks page titles with ? and & characters in the title. There are a number of posts from a MediaWiki developer floating around on the web that claim an alias will avoid this problem:

However, this doesn’t work for me. I get a 500 Internal Server Error.

Alias /wiki /home/mysite/

Any suggestions?

edited because I seemed to have RTFP wrong. Sorry.

I used this article and it worked for me:

I used it on