Hello,
I found an issue where the figure editor (the checkbox icon in the toolbar) incorrectly captures the color properties from the existing curves in the plot:
https://github.com/matplotlib/matplotlib/issues/2274
So I put together a pull request that fixes it:
https://github.com/matplotlib/matplotlib/pull/2275
Could we get someone (or someones?) to give it a whirl, make sure everything works as expected and that nothing obvious has broken?
Thanks,
Martin