Ok. I´m using two types of guitars, a musicman Steve Lukather, and a Dean Dave Mustain Signature, I think both have quite ´heavey input´. At first I noticed this when I had my POD played through my MIDI interface. But later when I had my guitar only using the pocket POD and listening through my headphones, it´s still there, mostly on the lower strings and lower tones!
´It´s like some unwanted distorsion. It shouldn´t be there!´ If I turn the drive down to ´0´ it´s still there!