at command doesn't work

I'm also having issues with using the at command. I have done the following:

at -f $(which epiphany-browser) now + 1 min (have the epiphany browser launched in one min time).
at -f /usr/games/glchess 15:47 (same as the original bug submitter)

running atq immediately after issuing the job will show it in the atq, but after the time assignment it will be removed from the queue.

only /etc/at.deny exist, my user is not one of those listed.

also, at mentions:
warning: commands will be executed using /bin/sh

based on this I have manually run the glchess program appended to /bin/sh and get the following:

christer@macbook:~$ /bin/sh /usr/games/glchess
/usr/games/glchess: 4: try:: not found
/usr/games/glchess: 5: import: not found
/usr/games/glchess: 6: Syntax error: word unexpected (expecting ")")

Thanks for taking the time to report this bug and helping to make Ubuntu better. As I understand the problem, this is correct behavior from "at", though perhaps the problem is that the error reports aren't being delivered to you. (Is local email delivery configured?) Check /var/mail for at errors.

Issues:
 1) at runs like cron, it does not have your Xorg environment and cannot launch X applications without additional scripting, etc
 2) running /bin/sh /usr/games/glchess won't work (and isn't what at does), since you're forcing it to interpret the script as a shell script (it's not). when at runs, it uses sh for spawning shells (and will correctly execute scripts of any type), the warning is there to remind about the reduced environment and capabilities