Barence writes "Twitter's battle to keep the microblogging service from falling over is having a dire affect on third-party Twitter apps. Users of Twitter-related apps such as TweetDeck, Echofon and even Twitter's own mobile software have complained of a lack of updates, after the company imposed strict limits on the number of times third-party apps can access the service. Over the past week, Twitter has reduced the number of API calls from 350 to 175 an hour. At one point last week, that number was temporarily reduced to only 75. A warning on TweetDeck's support page states that users 'should allow TweetDeck to ensure you do not run out of calls, although with such a small API limit, your refresh rates will be very slow.'"