Hi all, I see there's been a flurry of fixit and cleanup patches! Thanks all, especially Christoph, and especially as I see a lot of these oversights about python 3 syntax etc. came from my code. Sorry :) Thanks also for noticing the following issue Christoph:

This fixes an issue when running skimage.io.tests. When the tifffile plugin is left active two subsequent tests in skimage.morphology fail to read PNG files.

Should I add similar teardown() stanzas to all of the image IO plugin tests so that none are left present thereafter, to avoid other such errors? (Though the other plugins read PNGs, it might be a better habit to tear everything down anyway.) Zach