I don't see where I said Firefox's existing fragmentation was bad. I responded to the claim that "Almost all users of Firefox and Chrome are using the most up-t

I don't see where I said Firefox's existing fragmentation was bad. I responded to the claim that "Almost all users of Firefox and Chrome are using the most up-to-date versions of those browsers". The stats you posted show that this is not the case for Firefox. I don't think 87% can pass for "almost all users". Firefox 3.6 has been out over one year and, according to those stats, there are still ~13% of users who are using earlier versions. If Firefox 4-7 are released in 2011, without automatic updates, it would stand to reason that fragmentation could increase.