Right after the update, I realised that 300 Mb of internal storage had mysteriously been filled with something.
I go to /cache and what do I see ? A 200 MB file named "ouya-update.zip.reserved_do_no_delete".
@kitsune : You should have put this into the changelog.
What is it for ? Can I delete it as I sometimes need as much internal storage I can possibly get for sideloading reasons.