Found the problem. There was one nightly that did it and I had modified
my script for unzipping these and was unzipping the same one over and
over despite downloading the new one (I save them down as just
mozilla-os2 but keep the older ones by renaming them with the date) the
one I downloaded with the date of 10-22 was the one with the problem and
it kept getting downloaded the same. I found it on the 27 build and it
works and checked the 25 and it works, didn't check the 23 as the last 2
are working. It was a case of head space and timing.
Andy