For the first time in a while I had to edit the amount in an Expense. To my surprise, the keypad locked up, with the punched digit background staying blue for about 9 seconds, before the digit appeared on the screen.
Erasing is immediate.
I have rebooted the phone, no change.
I have killed and restarted the application, no change.
Time Master version: 5.5
iPhone: 4S
iOS: 5.1.1
Similar problems have earlier been reported in a thread named "Time Master 4.9 amount keypad locks or crashes"