a small symbol near the page name

hi,

maybe this question is a bit off topic but I’m a newbie and really could not understand this… please could someone help me?

before chosing the great Pinboard template I used this:

Platform from PageLines (http://demo.pagelines.me/blog/)

From that moment on a small leaf is always visible near the name of my page on the tab of each browser I use… it seems that using once that template I set up something which is still there even if I’m now using the Pinboard theme.

someone could explain me how to remove it?

thanks!