Funny how quickly perceptions change. Rivals used to chase after Palm and its Treo smartphones. Now it seems Palm is the one doing the chasing. Consider the new $549 Treo Pro smartphone I’ve been testing. The business-focused device is Palm’s latest attempt to lure customers wooed by Apple’s iPhone, Research In Motion’s BlackBerry and others. There’s no knocking the thin and attractive new Treo Pro hardware — it’s the best-looking Treo to date. I can’t say the same for Microsoft’s cranky and not overly intuitive Windows Mobile 6.1 Professional software.