I have the same problem, and it’s driving me nuts!
I’ve read a lot in the forums that there are tons of people having this issue. Why is WordPress not doing everything it can to resolve this problem.
It sure is not a server issue because I’ve already reported this matter to Hostgator and you know what? They’re seeing the visual editor working fine on their end.
But it isn’t on my end.
Like many others, I at my wits end on this.