Don’t recall seeing this mentioned here before so thought i’d point it
out. If you are (or are going to) run either the FastCGI or SpeedyCGI
versions of RT, and you have the latest version of HTML::Mason installed
(1.24), then you either need to downgrade to 1.23, or apply the following

Without doing either of these, you won’t have much luck in getting RT to
work (as I found out g)

Jody Belka
knew (at) pimb (dot) org