The log says it all - "unhandled window click mode / button combination: 0x302". That means that whatever you're doing to "copy" the items, it's not implemented in the server yet.
Looking at the protocol specification ( http://wiki.vg/Protocol#Click_Window ), 0x302 is the middle button click. What is that supposed to do?
Looking at the protocol specification ( http://wiki.vg/Protocol#Click_Window ), 0x302 is the middle button click. What is that supposed to do?