Windows 7 Pro 64bit
Settings:
Process to reproduce:
1) Switche to module Passwords
2) Minimized Epim to taskbar
3) Wait 2 hours
4) Restore (klick on Epim Taskbar button)
5) EPIM asks for the password (just the Dialog on the desktop)
6) Enter wrong Password
RESULT: Nothing happens, Epim stays minimized in Taskbar
7) Restore Epim again (klick on Epim Taskbar button)
RESULT: Epim opens with the module Password
(no screenshot, too confidential

From now on this can then be repeated at will:
a) Minimze
b) Restore
c) Enter wrong password
d) Restore
... until the correct password is enetered. Then go here, probably related:
"[BUG] Have To Enter Password Twice"
viewtopic.php?f=31&t=21224