Filament jamming in one area of the bed...

I've successfully printed many things in the month or so that I've had my Da Vinci AiO, and I've been very pleased with the machine, and the entire experience. But recently, I'm having a problem with filament jams that I'm having a hard time figuring out. It only seems to happen in the rear of the bed, on the left hand corner (as you're facing the bed from the front of the machine), and it happens whether I'm printing something in that specific area, or printing something big enough to require part of that area. Once it gets into that space, I hear a constant "thumping" sound and no filament comes out, until the extruder moves to another area.

What can I do about this?

I've tried lowering the bed a bit, and I'm about to (at the advice of Scobo) check my filament for moisture, but other than that, I'm rather clueless...