This is so tiny, it's barely worth reporting.

http://area51.phpbb.com/docs/coding-guidelines.html#fallbacks

The Limitation on this is that the base style has to installed and complete

Should be...

The limitation on this is that the base style has to be installed and complete

[Suggestion] We all make mistakes. And that's why getting someone else to proof-read our work would be a great idea before publishing anything.