According to Twitter some client applications stopped working because they broke a rule.
What rule? We don’t know which rule they broke. What we do know is what their own Developer Agreement and Policy states.
V. Termination. Twitter may immediately terminate or suspend this Agreement, any rights granted herein, and/or your license to the Licensed Materials, at its sole discretion at any time, for any reason by providing notice to you.
Emphasis is mine. I copied that text right out of Twitter’s Developer Agreement and Policy
The folks at The Iconfactory and Tapbots haven’t heard a word from Twitter. They just had their access turned off.
