Dropbox is having some problems this morning.
http://forums.dropbox.com/topic.php?id=31635&replies=83
HELLo!
I would just like to point out that we are aware over this error, and that we do not need any more confirmations of it. Until our engineers can look at it and get it fixed, I please ask you to be patient.
Our apologies for the inconvenience that this has created.
Happy syncin'!