Will the "removing all compatibility with FF/safari and only supporting IE6" be the end of my short and intense love affair with Fluther.com?

I can speak about myself as a computer literate guy, but I don’t know anything about programming languages and similiar stuff. What does this “removing all compatibility” practically mean?
Needless to say, I connect to Fluther.com via firefox (from my laptop) and safari (from iPhone).