Lots of new stuff added. Biggest ones I noticed are new look in the UI, inline spell checking and support for table editing. This is still beta and I had some issues with this release. Most of the issues seems to be with the confusion of different languages.

I went to the web site (http://writer.live.com/) to download the new build but I couldn’t find the download with my FireFox which is in Finnish language. After a while I tried to change the language into English and found the download. You are offered with different version of WLW depending of the language your browser has set. Some people have had problems with installing WLW if it’s different language version than other Live programs.
Read more here.

I’m using the UK version which brings me to the second problem. The problem was missing spell checker. It turns out that to be able to use spell checker, you have to run en-US version of WLW. There is a small program that I used to fix this issue and now the spell checker works fine.
Read more and get the fix here.

Anyway, apart from those problems this build looks good. I really like the inline spell checker. FireFox should have similar popup menu that offers you replacements for the faulty work. Also the new UI looks good.