did a shoot a month ago with the world's dirtiest camera. Doing dust spot removal today and got to that place where the dust spot icon will not move. this has happened to me often, but i never thought to check memory usage. resolution is to stop and restart LR. when i checked, LR was using 1.25BG or memory. based upon feedback from my other memory-leak post, i let LR rest for 30 minutes. no love. still holding 1.25GB of memory. use case to reproduce is VERY simple. open LR. select an image. remove about 40 or so dust spots. at some point you will not be able to move the dust spot cursor.