There are two problems with large directories/folders. 1.) If you have two many folders in any given category, the names of each folder get chopped off, to 5 characters or even less. It is incredibly difficult to find anything as well. 2.) If you have too many items in a folder, then you can barely get ahold of the slider on the right hand side. I've spent several minutes fighthing with that stub! Right now, the slider looks ok. That is because I've done a recent total reinstall of Poser, and am keeping my libraries down to a bare minimum.