I'll be the first to admit – this one's a bit of a mess. Samsung just started pushing a small OTA update to Galaxy S III units in the UK, which is said to bring a number of potentially major fixes. Considering there's no official word (or changelog) from Samsung, however, we're having to go on hearsay for this one.
Firstly, this update fixes the bug that allows any app to root and gain full access to Exynos 4 systems. That's a good thing, and has been confirmed over at XDA as patched with this OTA. From here, however, things get a little fuzzy.