California Pizza Kitchen ( CPKI), burned by weaker-than-expected sales, cut its fourth-quarter profit estimate and also lowered its expectations for 2008.The restaurant operator now anticipates a profit of 16 cents to 18 cents a share for the fourth quarter, down from its prior guidance of 22 cents to 23 cents. Analysts, on average, had forecast earnings of 23 cents a share, according to Thomson Financial. The company estimates that same-store sales, or sales at stores open at least a year, rose 1.8% in the period. California Pizza had projected a 2% to 3% rise in same-store sales. The same-store sales growth was at the high end of targets, at 2.8%, in October. But they dropped off in November and December, rising just 1.7% and 0.7%, respectively. For fiscal 2008, California Pizza, noting macroeconomic concerns, now anticipates earnings of 54 cents to 60 cents a share, with same-store sales flat to down 1%. In November, the company forecast 2008 earnings of 85 cents to 92 cents a share and same-store sales growth of 2% to 3%. Wall Street has projected a profit of 89 cents a share for the year. Casual dining chains, along with other consumer-focused companies, have taken big hits lately as middle-income customers cut back on spending amid the housing slump and credit tightening. Brinker International ( EAT), owner of the Chili's and On the Border chains, warned last week of a profit shortfall for the recently ended quarter, while Ruby Tuesday ( RT) posted a quarterly loss and slashed targets for the coming year.