I can see it.
for instance at http://starthilfe.wordpress.com/2013/02/19/like-test/
(it's the test blog of one of the support guys from WP.com German)
1) with Firefox 18.0.2 and Firefox 19.0: first gravatars overlay the "Like"-Button
2) with MS Internet Explorer 8: same behaviour
3) Opera 12.14: show an empty white box with scrollbars
- emptied cache
- all cookies allowed
- Firefox in safemode without any add-ons
Note: the problem occurs only at non-English blogs, where the "Like" button is localized.
For any further questions please contact "zodiak1978" (see some posts above in this forum-thread) a.k.a. Torsten from the German WP.com support. I know, that he sees the problem too. Hope you have a possibility for mail contact, I don't.
Unfortunately I have no more time to act as a software tester this week. Sorry.