I came across interesting site and initiative. In essence it asks users to upgrade their browsers and spare developers from supporting obsolete technology. Issues I had recently are nothing what developers face when they have to support older browsers. Current browsers are much safer and have better support for standards, which is not perfect (support for standards, and security).
Click, click, click NOW !
Oh, almost forgot to mention that this campaign is inspired and/or motivated by move from 37Signals to drop support for IE6 on August 15.