Shares of Polaris Industries ( PII) were among the NYSE's losers Thursday, falling 3.5% after the maker of snowmobiles posted mixed third-quarter results and warned that fourth-quarter earnings and sales would be below expectations. The company reported third-quarter earnings from continuing operations of $51.1 million, or $1.17 a share, on sales of $543.1 million. Excluding a tax benefit of $2.6 million, or 6 cents a share, the company would have earned $1.11 a share. Analysts polled by Thomson First Call were expecting earnings of $1.11 a share, before items, on sales of $547.8 million. A year ago, the company posted earnings from continuing operations of $44.6 million, or $1 a share, on sales of $510.6 million. Looking ahead, Polaris forecast fourth-quarter earnings of 97 cents to $1.02 a share, below analysts' average expectation of $1.15 a share. Polaris attributed the shortfall to weaker-than-expected shipments of all-terrain vehicles. "ATV retail sales for the industry as well as for Polaris were below our expectations in the third quarter, which resulted in dealer and factory inventories that are currently higher than we are comfortable with, given our view of the economic conditions for the balance of the year," the company said. Polaris expects fourth-quarter sales to be down 1% to 5% from the same period last year. Analysts had been expecting sales of $560 million, or growth of about 4% over last year's $539 million. Shares were trading down $1.59 to $44.46. Winnebago Industries ( WGO) rose about 3% after the motor-homes maker posted fourth-quarter earnings that fell from a year earlier but topped forecasts. The company earned $15.4 million, or 46 cents a share, on sales of $231.5 million. Analysts were expecting earnings of 42 cents a share on sales of $233 million. A year earlier, the company earned $19 million, or 55 cents a share, on sales of $283 million. The company said results were hurt by lower sales volume and a shift in product mix to lower-priced motor homes. Shares were trading up 74 cents to $28.36.