Spontaneous Dialing Problem

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Hi folks - I am running one of the generic 3.5 roms posted here and have run into a very strange situation. While using the device, usually while reading a book in uBook, my phone spontaneously tries to dial the last number dialed or received. It will do it repeatedly, even after a soft reset. The phone app even tries to dial when I actually turn the radio off on the phone. It does not try to dial when the phone is turned off.

Has anybody ever ran into this? It's really bugging me!