Well, it's a beta.
However, I feel it used to be better. I got a lot more disconnections in the last week or so than usual. On the other hand, it might be just because I'm playing more.
I agree it's annoying though, I've lost two games like this in the past three days! We can only hope a stable version will be availiable as soon as possible, and in the meantime be thanful for what we've got.
The server connection for the live chess sucks!!