Exactly the same to me.
With OSX 10.7 it works fine.
Just since I changed to 10.9 kernel panic accour regularly while uploading.
(Today it crashed the HD or better something of the "user" ... so I had to restore startdisc to be able to login again.)
Anoying!
- Will test it by using an external USB Host. If it is the USB voltage supply
- Will check usb drivers.