some graphs drawn as straight lines

[david415]

There is currently a bug in the generate_report.py which causes some graphs to be drawn as straight lines. I've audited the code and it seems to be a bug in pygal... however I am not completely sure yet.

I've discovered that if you change the chunk size on this line:
https://github.com/torservers/exitstats/blob/master/generate_report.py#L64

you can get a real looking graph if you set the chunk size to the right value, 70 for example.