[lipidfats]

"Called HTC and they said that YouTube did a server update that is affecting some Sprint phones and that it should be back up withing 24 hours."
"But I just called HTC Europe support and I've been told that google is performing an update that should end tomorrow at best. So at the beginning of next week the youtube application should be back working."

got that from xda... a couple people said they called htc and that was the reason... so we'll be alright soon i guess
Also, fuze people had problems, but some claim it's starting to work again but the thumbnails arent showing up still.