Uhh, check the changelog? And what more do you want? Better site-compatibility? Not happening anytime soon. Stop judging updates by the amount of bytes in them.
I have some issues with the way it searches where tweaking is necessary - but this can never be fixed. Opera is an ini-based application designed for higher-end users. The default configuration is shit.
You can get the weeklies at
http://my.opera.com/desktopteam/blog/ and see the changes in detail.