As the panic log already suggests, the panic is actually happening in 
Apple's IOUSBFamily. So I dived into Apple's sourcecode, isolated the 
problem and by now have completed a workaround.

Result: 
- Remote Buddy's kernel extension is not to blame and thus also 
doesn't need an update. 
- The problem is caused by how the USB APIs are used from user-space. 
- The problem only does/did affect users of the Keyspan RF Remote for 
Front Row.

I plan to release the workaround - along with a fix for the "some apps 
keep relaunching" issue (which needs some more debugging and code 
reviewing as I can't reproduce it with 1.7.3 anymore) - later today.

Best regards, 
Felix