The first one is related with locales like "en-US" and "pt-BR" (having files as index.pt-BR.html.erb and show.en-US.html.erb). Files with such locales are not inserted in the views path.
I've created a ticket with the exact line that is causing the error and how to fix it:
The other is related with XML HTTP Requests using localized templates. When we have such requests, we usually fallback to html, but that fallback does not happen in localized templates.
Again, I've created a ticket and pointed out the solution:
Cheers,
