Right now, files written for tags and users are written with tag names and nicknames lowercased. Such is not the same for extensions and distributions, even though their names are case-insensitive. So I think that all files need to be written with everything lowercase. So far all extensions and distributions have been identified as lowercase, so now is the time to change it.
After that's done PGXN::API will need to be updated to enforce the same thing (issue), as will WWW::PGXN.
Well, there's pgTAP. That distribution name will have to be fixed.
Done in b5f3a98. Will need to fix pgTAP on deploy, but otherwise ready to go.