Posted this as well in Webmin forum. If I switch to the old style Webmin it looks fine though ...
I'm running Webmin 1.670 on FreeBSD 9.2 and have only just noticed I can't create new cron jobs or save changes to existing cron jobs because all the buttons / links are missing at the bottom of the section eg "Save & Run", "Save" etc.
Checked this in Internet Explorer 11 and Firefox with the same result. I cannot confirm whether 1.670 has caused this as I have not tried to change a Cron job for a while.
Possible bug ??