So I too have a Kobo mini and can't seem to get anything displayed.
I installed from your link here
and had the same TTF font issues. Is that the most recent version of the file?
After converting the fonts to OTF everything runs smoothly. I killed nickel and ran the script and nothing is displayed.
Any ideas? On a Kobo Mini what is the method to display an image on the screen? It seems to have changed a lot between models.
[root@(none) /root]# /mnt/onboard/.python/weather.sh
Kobo Wifi weather forecast started.
Getting weather information . . .
Creating image . . .
Converting image . . .
[root@(none) /root]# uname -a
Linux (none) 220.127.116.11-850-gbc67621+ #606 PREEMPT Mon Nov 5 14:13:06 CST 2012 armv7l GNU/Linux
[root@(none) /root]# fbset
# D: 0.000 MHz, H: 0.000 kHz, V: 0.000 Hz
geometry 800 600 800 1280 16
timings 0 0 0 0 0 0 0