hello everyone! I have this problem that this unknown box above my INFORMATION sidebox cannot be deleted. Well i should say that i don't know where to find it and delete it. It looks really awful. I can see this unknown box using safari and IE however i couldn't see this unknown box when using this firefox mozilla. I have searched everywhere but still couldn't find solution to my problem. Anyone who knows something about this? Please guide me through!

many thanks in advance to you!!