Twitter being the brightest star in the social networking arena is vulnerable many threats. In the recent threat sensed by the company they had to disable the twitter flash widget which is used to display user updates on their web site or blog etc. This decision was taken on 23rd jan, 2010 in an interest to save credentials of the users which are using the flash widget.
However the javascript widget is working like it always does. The good part is that no account has been affected reportedly. But if you think you are having some problem accessing your account , twitter staff can be contacted at accountsafe [at] twitter.com.
Tip : If you have/had flash widget installed on your website or blog, as a precautionary step you should change your password to make sure your account stays safe.
Stay Safe !!
Sachin Khosla