Hmmm... well I was experiencing horrendous performance issues when trying to use Flickr yesterday. Photos were failing to upload (after waiting AGES), and just browsing photos was basically impossible. I've got now idea what was going on, but all is fine today.
I was watching TP yesterday, to see if anyone else was reporting such problems, so when I saw your thread, I instantly clicked it.
Dunno if it could be related.... :shrug: