I don't have it actually. It is on neither of my
> Windows installs. Can i just create it?
OK, this is a bug in the windows installer - fixed for next release.
Yes, just create it.
> I haven't seen any other user complain about
> this. Could this come from an upgrade of matplotlib?
> During the upgrade, it seems to be backing up stuff but
> who knows what it is doing exactly.
Well, you would only notice it if 1) you haven't installed FontTools
before 2) you are using windows 3) you are trying to use on of the
FontTools dependent backends (Agg, GD) and 4) you are kind enough to
report the problem.
> The font.cache is in site-packages/ttfquery, i presume
> this is correct?
After you fix the FontTools.pth problem erase this file and it will be
automagically recreated by ttfquery.