I've noticed that when retrieving a feed of albums from my PicasaWeb account, the <updated> tag in the top of the document is refreshed to the current time each time the feed is requested. Is this an error or intentional? For other types of feeds, the updated tag seems to be refreshed when the content of that feed is in fact changed. Shouldn't that be the case also for album feeds? It would be nice to use this tag to let my client determine quickly whether or not there are any new, edited or removed albums since the last time...

Request URL example: http://picasaweb.google.com/data/feed/api/user/[[[user_id]]]?kind=album

Response: <feed> <id>http://picasaweb.google.com/data/feed/api/user/[[[user_id]]]</ id> <updated>2008-02-26T09:36:30.932Z</updated> <--- this timestamp is changed each time