I've been having this same issue with the same keys for a while now. However, I'm not convinced it's actually a hardware issue, because:
- It's intermittent and doesn't seem to be reliably fixed by any physical orientation of the machine
- It's ALWAYS fixed by rebooting, but appears again hours or days later.
- It appeared almost immediately after I upgraded to Mavericks.
I suspect this is actually caused by an errant application that intercepts keyboard events somehow with a bug. I'm not sure how to track it down though. Some of the possible culprits:
- Divvy
- Launchbar
- Mavericks itself?
- It's intermittent and doesn't seem to be reliably fixed by any physical orientation of the machine
- It's ALWAYS fixed by rebooting, but appears again hours or days later.
- It appeared almost immediately after I upgraded to Mavericks.
I suspect this is actually caused by an errant application that intercepts keyboard events somehow with a bug. I'm not sure how to track it down though. Some of the possible culprits:
- Divvy
- Launchbar
- Mavericks itself?