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Social Networking site Facebook announced that it will pull out it chat support for Microsoft’s Internet Explorer version 6 on September 15, 2010. The company instead urged users to upgrade to a newer version of web browser.

Facebook chat
On Facebook official blog, the company states that they are fixing some bugs and will make some improvement on its chat technology to make it faster and more stable.
Facebook chat is one of the most popular features of Facebook.
Reference: Wikipedia.org
Reynald
November 10th, 2010 at 12:28 pm
I believe FaceBook is doing this to make the site more usable to its users. Nice step though.