problems running this in mac os

[nwtn]

I get the following zcat/curl errors when trying to run this in Mavericks:

dnewton@newtron ~/Sites/gh/fetcher  ./getData.sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0 9996k    0  5085    0     0   6818      0  0:25:01 --:--:--  0:25:01  6816zcat: unknown compression format
  0 9996k    0 33645    0     0  39663      0  0:04:18 --:--:--  0:04:18 39628
curl: (23) Failed writing body (0 != 1360)

After this, I get no output if I re-run the script:

dnewton@newtron ~/Sites/gh/fetcher  ./getData.sh
dnewton@newtron ~/Sites/gh/fetcher

Any ideas? Anybody else have similar problems?

[nwtn]

Removing /tmp/urls.txt lets it run again, with appropriate output, but I still get the same errors.