PHP highlight in diffs seems to be broken

Heya, I'm fairly new here so first of all, I would like to add some feedback as I'm not sure where to do this properly:

• It's a pain to get here. It's nearly impossible to find the issue tracker, be it via google or any bitbucket websites.
• Clicking in the breadcrumb on 'Public Issue Tracker' will lead me to https://bitbucket.org/account/user/site/projects/PROJ and that doesn't make sense
• Clicking in the breadcrumb on 'Bitbucket' will lead me to https://bitbucket.org/site/ and 'I was never there'.

This doesn't seem to be the intended behavior to me.

My actual bug report is rather simple, it seems like the PHP highlights are not working in pull requests. Whenever I make a pull request and view it (either the PR or the commits, doesn't matter) or when I try to review another pull request, it looks like it has no highlight at all, so I guess it doesn't detect the PHP files? This makes reviewing really annoying.