With the recent discovery of an exploit available that
can allow any user to segfault the Unreal IRC Daemon, people
have been severely confused as to what exactly is going on
with each version of Unreal.

As it stands, there are two "branches" of Unreal in existence at this
point in time: A "stable" branch, and a "development" branch.

The stable branch includes Unreal 3.1.1, Unreal 3.1.2, and the newly
released Unreal 3.1.3. It uses the "old" configuration file format.

The development branch includes all of the Unreal 3.2-BETA releases.
It uses the "new" configuration file format.

At this time, Unreal 3.1.1 and 3.1.2 as available on the unrealircd.com
website are patched against the segfault exploit, but suffer from
mode propagation errors on server synchs as a result.

Unreal 3.1.3 is also immune to the exploit, and does NOT suffer from the
mode propagation problem. It is the recommended download for the
stable branch.

All versions of Unreal 3.2-BETA including BETA7 and below are susceptible
to the segfault bug. Unreal 3.2-BETA8 is not susceptible, but DOES suffer
from the mode propagation problem. BETA9 is being worked on and will be
released soon.

"What do you mean by mode propagation errors?"
If you're in a channel on server A that is set mode +nt and server B synchs
with server A, server B does not see the channel as +nt. That's pretty much
the general idea.