Just to balance things out - I ran if for 1.5 yrs under 8.6 w/o any problems whatsoever. It's a standalone FileMaker database, so I'm not sure what was causing problems on bbum's setup. A great app, although tighter integration w/ the internet (currently it needs a separate program to look up titles) and greater ability to customize reports would improve it. And that's all supposed to be available in v. 5.0 (which is way overdue, at this point).