getting Fn and multimedia keys working in kde4

[Paul S]

My Fn-F10 (eject) won't work on kde4.  On kde3, I could use input 
actions to configure the Fn-F10 to issue the eject command.  When I try 
it on kde4, I get a popup saying that Qt does not support that key. 
Same with Fn-F2 (battery).  Same with some of the multimedia keys on my 
usb multimedia keyboard (sleep, stop, reload, Tools, Explorer).

I upgraded to 4.3beta with same results.

Any ideas how to get these working?