First of all, I really envy you. For those who don't know what's going on, a quick recap: the recent updates for Goodreader for iPad, version 3.1.0 and 3.1.2, are not mature enough. They have 2 big problems: 1, performance dropped seriously. 2, rendering quality decreased. If you read PDFs larger than 80MB(may vary), version 3.1.2 is very slow compared to 3.0.2 but much faster than 3.1.0(unusable). Think twice before hitting update button. If your PDFs are small, you might not see difference(performance wise) between 3.1.2 and 3.0.2. PS: Goodreader 3.1.3 for ipod/iphone is coming out. Be cautious. updates: thanks for all replies. as Night Spring mentioned, having a 3.0.2 ipa will not help unless it's your own ipa(previous version). Backing up old ipa is a very good practice. I'll do that from now on. as b.c. said, Time machine is even a better way to prevent any mistakes including bad updates(for Mac system only. ) However, I don't have my Time Machine hard drive connected all the time. Need to sync more frequently. Strange things are my Goodreader(iPad+iPod) never crashes. My iPod touch Goodreader doesn't suffer any of problems mentioned here. And I don't use encrypted web download so I didn't have to face all these problems. Only performance drop matters to me. Hope next version will come soon and fix all problems.