The login problems affected some of the company's customers between 6:05 and 6:55 PDT Tuesday morning, the company said in a note on one of its announcement boards.
"The issue has been identified and all access restored," the company said in its note.
It was not known if the problems were related to other problems on Sunday and Monday. Further information was not available on the message boards, and eBay representatives did not return calls seeking comment.
On Sunday, customers wereto view, bid or list items in eBay's clothing or jewelry areas for more than nine hours. On Monday, people that they couldn't access eBay's home page for more than an hour, and some sellers complained that their auctions had mysteriously disappeared from the Web site.
Last month, eBay suffered a 90-minutethat affected customers' ability to reach its home page and some other pages. Later in the month, a site slowdown eBay users' ability to reach the site for nearly three hours.
In a note posted on its announcements board Monday, eBay acknowledged the ongoing problems and said it would send e-mail to those affected, detailing the problems and the steps it was taking to solve them. The company did not say what those problems or solutions were, saying only that they resulted in "specific issues" for different customers.
"We realize that this has been an inconvenience for our members, and we sincerely apologize," the company said in its note. "Please be patient with us as we send these emails, which we hope will answer your questions."
eBay has been continually upgrading its system since a round of multi-hour outages in 1999. The company firsta backup system, then proceeded to move its database to a , with different portions of its site hosted on different servers instead of all on the same server. By distributing its systems, eBay has been able to limit the spread of problems from one area of its site to the entire site.
The San Jose, Calif.-based company is currently engaged in its "V3" upgrade, which will include real-time updates of its data and minute-by-minute updates for listings. Listings are now updated about once every hour. The company has said the upgrade was not responsible for last month's outage.