For some reason whenever I open mail the badge is showing a '4' on the dock icon. I don't have any new mail - I went through each folder to make sure nothing was hidden - and if I go online to check my .mac account that way it shows up as '0' new messages. Is there a way to reset the dock badge? This just started happening about 2 days ago. I went through each of my mailboxes/folders and did a rebuild but that didn't help..