Just looking at the charts from the start of Dec the USD has...

Just looking at the charts from the start of Dec the USD has fallen and most other major currencies have risen (AUD, Yen, Franc, Euro). This to me suggests a flight out of the USD to other currencies, probably because the US rates are now effectively zero. My guess is that the Franc is probably due for a correction at some point as its risen up pretty quickly.

I've read that the Swiss Franc is under pressure because of bad loans Swiss banks have made to Eastern Europe, which may default, but this seems to have been ignored for the moment.