I am still stuck of 5.0.2, I have tried every upgrade (excpet 5.0.8 which I will tackle again this weekend).
Sometimes the upgrade actually fails, sometimes it completes only to watch the corruption happen 30 minutes later and the database go down. (FYI - this is what I used Mysql Crash Recovery - Zimbra :: Wiki)
I have even tried exporting and importing every database and the same result happens in the end, innodb corruption.
I would really like to upgrade to get the new features as well as better support for zdesktop.
Does anybody else have any suggestions?