[Plugin: Flattr] Is the plugin working for wordpress 3.3.1?

I am not able to register a blog with flattr, as some other people, the link to authorize doesn’t have the oauth token filled.

The url to authorize is this:
https://api.flattr.com/oauth/authorize?oauth_token=&access_scope=read,readextended,click,publish

Is this a know issue, or something related to my install?

PS: I tried with both chrome and firefox after cleaning the cache + cookies.

http://ww.wp.xz.cn/extend/plugins/flattr/