Query re brick bug before rooting

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http://androidforums.com – Hi, I'm taking my first tentative steps into the work of rooting and rom upgrades, I've read the very informative guides on the site but I have one concern before I consider rooting my i9100 S2 and its the brick bug which my S2 is susceptible to "checked with eMMC check". I am currently running ICS 4.0.3 "I9100O2ULP4" but because my S2 is currently on UK O2 I am still waiting for them to release their official upgrade to 4.0.4 which all the other UK carriers have already released. I am considering rooting and installing JB but even after reading through the forum I a (General)