I don't see any udev bugs here, the bugs that I can see are:
1) the kernel doesn't specify any devices (via MODALIAS or map files) for i2o_block and it isn't a dependency of anything
2) grub device mappings are broken
3) installer giving the wrong driver
as noted, once these are overcome the userland (initramfs and udev) work fine
I don't see any udev bugs here, the bugs that I can see are:
1) the kernel doesn't specify any devices (via MODALIAS or map files) for i2o_block and it isn't a dependency of anything
2) grub device mappings are broken
3) installer giving the wrong driver
as noted, once these are overcome the userland (initramfs and udev) work fine