"We have made some great progress today in tuning the system to a point that should allow our partners to operate as they were before the recent issue began," Ryan Sarver, a member of Twitter application platform support team in a discussion forum for Twitter developers.

The latest problems with the Twitter application platform started on Saturday afternoon, when the Twitter Web site suffered an unexpected outage.

The measures the company took to restore the service affected the API (application programming interface) and other functionality that third-party applications need to access Twitter data and services, it said. Twitter didn't detail those measures and has not offered a technical explanation of the problem.

Although Twitter is confident the issue is resolved, it is asking external developers to check that their applications are functioning normally. If they're not, Twitter wants developers to submit a problem report, along with information like the IP address of the machine making requests to the API. the IP address of the machine they're contacting in the Twitter cluster and the Twitter API URL they're requesting, among other things.

"If you don't provide at least some of the additional information we will not be able to help you, so please do some leg work and help us help you," Sarver wrote.