The OK button on 'New Job' page gets enabled properly when doing the following
actions in the specified order:
1) enter job name
2) click on radio button

However, I often first click on a radio button, and then enter a job name
(probably because I often worry more about the job type than the name, and
because there are just all those buttons asking to be clicked in the middle of
the screen).
In this case, the OK button stays disabled. I have to click again on the radio
button to be able to click OK.

A very minor issue, to be sure.