What’s good for Research in Motion may not be good for Palm, which could end up selling fewer smartphones now that its rival has settled a dispute that threatened the future of its BlackBerry devices. Shares of Palm slumped nearly 4 percent while BlackBerry maker Research in Motion picked up as much as 19 percent in extended trade after RIM announced it had put an end to a 4-year-old dispute by agreeing to pay patent holding firm NTP $612.5 million.