Yahoo is fixing a glitch in its e-mail service that prevented some people from using the search function.
"We identified an isolated issue with our new e-mail search functionality which impacts less than 0.5 percent of mail users and will not result in any loss of data," Yahoo said in a statement. "We are on top of the issue and have already begun to deploy a fix."
A company spokeswoman said she could not say when the company expected the problem to be resolved for all affected users.
A CNET News.com reader said he had been unable to search his Yahoo e-mail messages for at least several days.