Funny thing is, Epic didn't really understand how to number versions.

Quick demo:

Linux Kernel 2.4.67.23456

First number is major change that is obvious
Second is a somewhat large change in how things work, but you'd probably have to look for it.
Next is major Bugfix.
Then minor Bugfix

So 1.24 would actually be something around 1.60. (Way higher number due to semi-visible change)