I am using 1.3.3.8 on Feisty, amd64. In Feisty (assuming you have enabled all the repositories) Synaptic lists 1.2.5 and 1.3.4, although if you ever installed 1.3.3.8 you can use Package > Force Version to install 1.3.3.8. I tried 1.3.4 but found it was too buggy for me. I can take a little problem now and then, but 1.3.4 was too much.
Gutsy is going to be released in a matter of days. The final release candidate was posted on Ubuntu's website yesterday. This evening I downloaded and booted it just to play around with it. Synaptic in Gutsy lists 1.3.3.9 and 1.3.4, that is, 1.2.5 is now history, but they decided to keep 1.3.3.9 in the repositories. Gutsy is going to be sweet, especially if you have a 64-bit computer and want everything to work. All the multimedia stuff worked right out of the box - flash, java, sound, movies - I couldn't find anything that didn't work. And it also comes with compiz, so you can do all the cool desktop tricks. Can't wait.
