With Apple increasingly unlikely to release a new version of its iPad until the fall, at least one analyst is worried that it will spell trouble for sales of the iPhone 5 this spring. Per Barron’s, R.W. Baird analyst William Power projects “a sharper fall-off in iPhone sales due in part to heightened competition, and the lack of a March/April iPad refresh to depress this year’s sequential comparison relative to a year ago” when Apple released its third-generation tablet. Power’s remarks come amid reports that Foxconn earnings have been hurt by “disappointing” iPhone 5 sales over the past couple of months despite the fact that the iPhone 5 has been the best-selling smartphone in the world since its launch last fall.