Does anyone know what is going on?
I clearly understand you are saying about safari "it worked before but isn't working now". In fact I note that this has also been the case with other safari users at other points in time too. That means the issue may be news to you but it sure isn't news to us.
In the final analysis after the other bloggers made multiple postings to the forum most just downloaded another browser and got on with their blogging so, I thought you might gain by knowing that up front as opposed to wasting your time.
We are aware of the issue with older versions of Safari shipped with 10.3. Is is possible to upgrade Safari in your case? The newer versions of Safari seem to work without any problems. Alternatively, I would recommend using a different browser (Camino or Firefox) until the issue is resolved.