Just wondering, in there a problem mixing the boot.img of one release (say 15-07-2002) with another's *.iso (say 08-11-2002)?

I'm asking because I just burned a few new CDR with the latest release of 3.1 and am having some problems during boot-up (several missing modprobes?). I never had this problem before, but I didn't make new boot disks this time either....

TIA,