I have a 1.1.3 iPhone updated from 1.1.2 with Nate True's method. From time to time and with no reason, the iphone starts to soud odd, like it was in mono or something. This applies to every sound of the interface, such as the "slide to unlock" sound or the ringtone. The only way to fix it is to reboot.

Someone else havin' the same issue?