I've been having a few problems with my drone since I purchased it last Friday (August 26th). On my first series of flights, the AR.Drone seems less stables than I had expected and would occasionally flip over and crash while I was flying it - that may have been due to inexperienced flying. One of the crashes resulted in a slightly bent propeller on the rear starboard side, but the Drone was still able to fly. Once the AR.Drone hit ~10% battery life, it started flying just above the ground and couldn't get any lift. I chalked that up to low power.

After a battery recharge, the Drone would fly backward and to starboard 6 - 10 feet on lift off before stabilizing. Once stabilized, an instruction to send the AR.Drone forward or backward would cause it to fly starboard and back instead. I thought this problem might be caused by the slightly bent propeller, so I swapped it with the forward port propeller. This fixed the lift off drift (I had expected the AR.Drone to drift forward and to port after the swap, but instead it lifted more-or-less straight up), but not the Drone's inability to fly forward. The Drone continues to fly sideways as it did before.

Overview:
- On lift off, the Drone drifts back and to starboard before stabilizing and hovering
- Instead of pitching forward when I push the ("virtual") control stick forward, the Drone rolls to the right and (after reviewing the video's) pitches slightly back
- When I pull the control stick back the Drone rolls right as well
- It seems I can yaw right and left as normal
- Swapping a slightly bent propeller on the rear starboard with the forward port propeller appears to mostly resolve the lift off drift, but not the starboard movement when the pitch control stick is pushed forward of pulled back

Does anyone have any idea what could be going wrong? I'm assuming a motor might be bad, but I'm not certain. If it is a bad motor, would it be both motors on the right side?

Any help is appreciated, I don't want to fly sideways any more

Regards.