I have the Same problem:

The upload of "Calendar" failed. There was a problem uploading the
file to the server.

About a week ago, I started getting the logon prompt unexpectadly and
often.

I've tried deleting the calndar form Tools..Accounts.

I've tried republishing.

No luck.

Please post any solutions you have found. Also please post if you are
having the same issue.


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timlarson
http://forums.slipstick.com