It’s a truism that when a company’s shares take a knock after a nasty surprise announcement, it takes them a lot longer to climb back than it did for them to slump, and shares in Newbridge Networks Corp are not expected to rebound quickly after the company’s first quarter profit caution sliced 31% from its value: some analysts still believe the earnings slip is an anomoly, but it has raised doubts about a company that was previously seen as a rock-solid networking high-flyer.