Cannot boot. Is the recordfail thing the problem again?

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http://askubuntu.com – It is the third time I cannot boot this system (Natty with Grub2 in a dual boot macbookpro). I guess it is, again, due to a problem with the recordfail thing and the grubenv file that gets corrupted or who knows what, but it only bothers from time to time. I can boot any iso file in the filesystem using grub2's menu, but I cannot boot the properly installed system. What can I do? And, then, how can I stop the system from letting me without being able to boot due to stupid recordfail management. Thank you. (HowTos)