I have a problem with clearing LikeButton cache with Debugger tool. Debugger seems to clear only shared links cache but not liked cache.
Example:
http://czat.wp.pl/id_czata,3831,naszgosc.html
in the code of this page:
<meta property="og:image" content="http://i.wp.pl/czat//zdcz/u/un/untitled1120.jpg" />
Debugger show right image:
https://s-external.ak.fbcdn.net/safe_image.php?d=AQDo_KKMFuh_-ZUT&url=http%3A%2F%2Fi.wp.pl%2Fczat%2F%2Fzdcz%2Fu%2Fun%2Funtitled1120.jpg
But on my Wall (after liked the page) I have still wrong image (old one):
https://s-external.ak.fbcdn.net/safe_image.php?d=AQAdFogv-Fi4qFhd&w=290&h=290&url=http%3A%2F%2Fi.wp.pl%2Fczat%2F%2Fzdcz%2Fs%2Fsy%2Fsylwia_mala1207055.jpg
Andrzej: looks fine on both ends for me: Lint debugger and Screenshot from wall.
NOTE: Your Like button seems to be liking a different page than the one you linked, you need to update the url for that button.