This may sound odd, bare with me.
I had a similar issue, and just forcing them to reconnect to the base station(USB, single) worked perfectly, and allowed full use of the wireless keyboard and mouse. It reoccured after reboot, and it worked again. Once the final load in to SuSE 10 occured, I had to do it once more, and that was it, now logging in and out or rebooting, it all works fine.
Hope that helps.