[Koha] HTML tags shown in titlebar of the browser

[H.S.]

Hello,

In Koha 2.2.9, why are the HTML tags used to format the Libraryname
diplayed on the title bar of the koha OPAC webpage? For example, if I
set the preference to <h1> My Library </h1>, the formatting of the
string on the Koha webpage is fine, but "<h1> My Library </h1>" is
displayed on the title bar of the browser window (with the tags and
all). How to fix this?

thanks,
->HS