Cedar Fair LP of Sandusky is lowering its 2006 earnings guidance due to falling attendance at its amusement parks. The company said it now expects to post full-year revenue of $815 million to $835 million and full-year adjusted earnings before interest, taxes, depreciation and amortization of $285 million to $305 million, according to a company statement. The statement did not list its previous earnings guidance, and a message left at Cedar Fair on Friday afternoon was not immediately returned.