I've read reviews that say version 5.5 has two software differences-- 1) if you scroll and have more than 100 items, a box pops up that searches by letter. When you get to the right letter, stop and it lets you scroll through the songs again. and 2) At the bottom of the "music" menu is a "search" function. I am pretty sure what I've got is the 5th gen--however, if I scroll it does let me scroll by letters, yet, there is no "search" function that I can find. Does 5th gen have #1, but not #2, or what? Am I being an idiot? thanks!