The media formatters were always 0 because of the implementation of VersionedFormatter. Changed how the original code was written; they now report correctly.
To verify, I ran this through with the Auto-help generator in Nuget and it was able to parse the whole API.
Fixed issue with media formatters not being reported
Looks like you forgot to include the changes to the project files. I fixed that now, please pull in those changes first :)
Released Nuget package version 1.3.