I've been use Keepass for a long-long time. Since 1.x version, in Linux, Windows and PalmOS (Export to Keyring)! Recently I started using 2.X version in Windows Desktop with Keepass Touch (iOS) companion. It was allright since last 6 months. But suddenly windows desktop version starts report an error and cannot open database anymore. Its not wrong key (or invalid composite key, as usually). Its about wrong Base 64 Character presence in master key... But the key is just the same! My database is dropbox...