To the collective wisdom: I installed Leopard on the release day (now 10.5.1, clean install + migration assistant for apps and accounts). Unfortunately, Preview.app crashes unpredictably when I open pdf files. There are two instances of the problem: 1. As the file is being loaded, I get a beachball and Preview.app soon "quits unexpectedly". 2. As the file is being saved, Preview.app "quits unexpectedly" and, worse still, it does NOT save my data! I cannot notice a pattern, neither can I reproduce the problem at will. Emptying caches, repairing permissions and the usual assortment of Onyx maintenance utilities hasn't helped. With Acrobat CS3 still incompatible with Leopard, I really do rely on Preview.app for the bulk of my work. Any ideas? Thanks.