Comment 7 for bug 364538

I found a solution to this problem, recreating file "casper/initrd.gz" after updating script "/init".
This update consists to insert the following lines before line containing "maybe_break mount" :
   modprobe -r libusual
   sleep 3
   modprobe usb-storage
   sleep 5

The second line is mandatory to let "libusual' remove smoothly before loading "usb-storage".
Moreover, I successfully performed a non-regression test with a "slow" machine which was not concerned by this problem.