Two Carnival cruise ships delayed by Tropical Storm Karen.
Cruise passengers continue to shy away from Carnival, despite lower prices.
The world's largest cruise company now expects revenue to drop 3 percent this year, worse than its prior forecast.
The South Florida-based company says its profits for June through August are down 30-per cent from the same time last year.
Carnival is still trying to entice customers back with deals and guarantees, after several high-profile incidents on its cruise ships this year.