I have a Facebook Application with an iframe based canvas that contains a like button (also iframe), in the head of my iframe i've specified the standard meta tags (og:title, og:url, og:site_name) and they seem to work fine (the information is displayed correctly in the profile wall) except for the title. I've tested various links of the app with the Facebook URL Linter and the ug:title tag is ignored completly. Have any of you had any trouble with the open graph tags inside facebook applications? Any ideeas are apreciated, thanks.