Postgresql v6.5 changes

A quick question -

Last week I compiled and ran ver 6.5 beta2.  I noticed that the "up arrow"
key would allow me to easily edit my previous command.  In working out a
quick query, I always thought this was a nice feature that MySQL had and
Postgres did not.

I have since downloaded and compiled v6.5, and noticed that this function
has gone away.

Did I do something by chance to enable this, or has this feature been
withdrawn from the distribution version.  Or, do I need to do something to
bring this feature back?

Thanks in advance for any assistance.

Bob