eBay's Web site was returning error messages on Sunday to vendors that use the auction site's API to access the site for their customers. eBay said that between 9:45 am to 2:30 pm PST on Sunday, "some members experienced difficulty accessing multiple eBay functions on an intermittent basis. Those functions most affected included Seller Search and View Seller's Other items, Bidder Search and certain tabs in My eBay." The announcement went on to say, "In addition, many third-party providers, including PayPal, would have experienced intermittent difficulty accessing eBay through eBay's API. This would have resulted in difficulty for eBay members using those services."

Sellers posted messages on auction forums, voicing concerns about error messages when posting auctions. They also voiced concerns that buyers might be unable to find their items, since the search function was affected by the glitch. Sundays are popular days for launching auctions to eBay. Many auctions end on Sunday since it is one of the busiest days of the week for shopping on eBay.

eBay also stated in its announcement related to Sunday's glitch, "The ability to view items, search for items, bid and list items were available throughout the day, though some members may have experienced very brief difficulties with some of these functions on occasion."

The technical problems seemed unrelated to the worm that attacked many Internet sites on Saturday. Experts predict the worm may resurface on Monday as people return to their offices.

There is no word on whether eBay will credit fees to sellers for auctions affected by the glitch.