Fix unwanted space between header and content for Firefox. 
Fix unwanted space between header and content for Firefox. 

(margin+float+ff == rand(*@$*#@))

nfredrik/teambox,ccarruitero/teambox,nfredrik/teambox,irfanah/teambox,vveliev/teambox,irfanah/teambox,codeforeurope/samenspel,teambox/teambox,vveliev/teambox,vveliev/teambox,nfredrik/teambox,crewmate/crewmate,ccarruitero/teambox,nfredrik/teambox,irfanah/teambox,irfanah/teambox,rahouldatta/teambox,crewmate/crewmate,rahouldatta/teambox,vveliev/teambox,rahouldatta/teambox,codeforeurope/samenspel,teambox/teambox,teambox/teambox,crewmate/crewmate