Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
Google +1 Button on Discussion pages (Google plus one)
I'm trying to put standard Google +1 button on discussion page, but when I've done this following this http://www.google.com/webmasters/+1/button/
instrucktions, I'm getting bonk, after putting part of code to head seaction or after body (in default.master.tpl)