Firefox 13 is display code differently that previously worked in Firefox 11 and 12. Further both website below display correctly in: IE8/9, Safari, Chrome and Firefox 11 and 12. http://powellcareandrepair.web12.hubspot.com/ http://www.facebook.com/sv.capella1 In [http://powellcareandrepair.web12.hubspot.com/ Powell Care] There is a 1 pixel gap rendering next to the 'Honey Do' flash button. That only appears in Firefox 13. On the [http://example.com Facebook Page] the profile picture does not line up with the cover photo as it should... In every browser I've tested '''except''' Firefox 13 the profile picture display correctly.