No minus symbol for negative tick labels when saving as PDF

I ran into a bug that only occurs when using seaborn. If I make a plot with negative y tick labels, I can save it as a pdf and it works fine:

import matplotlib.pyplot as plt
plt.plot([-1,1], [-1,1])
plt.savefig('~/Desktop/test1.pdf')

test1.pdf

But if I import seaborn, the negative symbols on the y-axis disappear:

import seaborn as sns
plt.savefig('~/Desktop/test1_sns.pdf')

test1_sns.pdf

Saving as PNG works fine

plt.savefig('~/Desktop/test1_sns_png.png')

I just upgraded to matplotlib 2.0.0, but this error occured in graphs created before that. I’m using Python 3.5.2 on Linux Mint 18.1 (based on Ubuntu 16.04LTS)

[dvdhfnr]

A workaround is to save the figure as ‘eps’ and then convert it afterwards to ‘pdf’. This keeps the ‘-’ sign.

[mwaskom]

@sbanerjee23 I appreciate that venting your frustrations can feel nice, but if you actually read the thread you’ll learn that the problem is outside the scope of seaborn and that you should ask elsewhere.