Q: Why does my stats web page (after clicking on "stats" in the printer
section of the web interface) spew forth raw PNG data?

A: Because you don't have write access to the place where your config file is
telling printbill_grapher to dump the PNGs - so when gnuplot is invoked, it
can't write the output file, so it dumps it to standard output. Solution -
go to graph_png_output_dir (e.g. /var/www/printbill), make sure the web user
has write permissions, and remove any PNG files in that directory.

Q: When I run printbill_grapher, it explodes! What did I do wrong?

A: Probably nothing - print some more files, some of the stats graphs need a
few data points to be able to generate anything meaningful.

Q: Printbill seems to hang sometimes with Windows print jobs... what's
going on?

A: The quality of Windows postscript drivers varies enormously, and the
output from some is so dodgy it can't be interpreted properly by
ghostscript. Best results are generally had with Adobe's generic postscript
driver (download it for the specific Windows version from Adobe's web site).

Q: Your code sucks! Can I help make it better?

A: You can try. E-mail me your improvements :)
