Yep, it's another update to Google native S60 YouTube client, to v2.2.6, though note that this seems to be more about increasing compatibility - there are no performance improvements, you still can't log in to YouTube and it still doesn't work full-screen on the Nokia 5800. Ah well, at least it shows the development team is active! You can grab v2.2.6 via m.google.com on your phone.