Having some strange addition to the URL of blog exerpts page and every post. It is added by plugin (when I disable it, appendix disappears) and appears only in FireFox and Chrome (not found in IE8 and Opera).
For example: http://dvascheta.ru/myisli-odnoy-golovyi#.UyNZ9s4ll58 -- for blog page
And http://dvascheta.ru/internet/banneryi-s-zhivyimi-lyudmi.html#.UyNaBM4ll58 -- for single post.
#.UyNaBM4ll58 -- this abnormal appendix. It is different for different computers.
What this can be?