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Php doesn't strip the slashes when info comes out of the database. The difference here is that php4 automatically adds slashes to incomming variables (from a post/get) and php3 didn't. So if you're adding slashes manually, suddenly you have double. Either drop your second addslashes() or add a stripslashes to the beginning to all the variables that come in.
Истинная правда, и про это нельзя забывать