modprobe failures after 8.2 install

I've just moved from a fully-functional 8.1 to 8.2 (clean install) and am now experiencing some module-related weirdness. At boot time, modprobe issues numerous errors of the form modprobe: Can't open dependencies file /lib/module/2.4.20-4GB/modules.dep (No such file or directory) leading to inaccessible soundcard, inability to start up PPP, failure to detect USB printer, etc. Looking in /lib/modules, I see a directory 2.4.20-4GB-athlon, rather than the 2.4.20-4GB that modprobe is clearly expecting. Anyone else experienced anything like this? Can anyone suggest a fix? I've tried reinstalling with acpi=off, in response to a suggestion from SuSE support, but the same problem occurs. Nick