I've noticed large amount of memory being used when the DB hangs for awhile on a song analysis. The amount will go from 58x mb of memory free counting down to 13x mb free takes about 1 minute then it changes songs and it then goes back to around 58x mb. I have 1.5 GB of memory on a 2GHz machine so it doesn't really bother me but could be annoying to people with less memory.