Just found this bug today while receiving the 2.27 update notification. If the program is open and you issue an autotype to another window and the update notification window is shown DURING the autotype, the keyboard and mouse remains locked even after the autotype finishes.
Steps to reproduce:
1. Open KeePass;
2. Select an entry in your database;
3. Issue the the "perform the autotype command" (Ctrl + V);
4. If an update notification window (from KeePass itself) is shown while the autotype is still running, the autotype will STOP in the middle of the login / password typing and the keyboard / mouse will not be unlocked. Only way to unlock it is restarting the computer (afaik)
Issue found on Windows (KeePass 2.26) while autotyping a password into Firefox (30.0).