Update at 8:35 a.m. PT: The site's functionality has been restored, according to a Flickr spokesperson.
Flickr is having performance issues just a few days after a major site revamp.
Some users have been unable to access the site at all, while others have run into delays logging in or launching certain pages. Certain tasks, such as logging into my Flickr account and accessing my Photostream page, each took several minutes to complete.
The photo-sharing site acknowledged the problem in a tweet early Friday, telling users: "Experiencing slowness or having trouble accessing the site? We're on it, and are working to fix the issue as quickly as possible."
Flickr revamped its Web site on Monday with changes to the home page, Photostream page, and other features. The site also added a much larger photo layout and 1TB of free space for each user. Reaction to the new design has been decidedly negative, at least based on a host of comments at Flickr's Help forum.