Calendars have been reset (.MAC) - what to do?

[Kevin Callahan]

For a couple of days, I've been getting an alert saying my calendars  
have been reset on .Mac

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considering I sync 4 computers, a cell phone and an couple of iPods,  
what's the best way to handle this?

BTW:  did Apple reset everyone's calendars ? or am I just an unlucky  
one?

K