I'm getting an error for one of the tifffile plugin tests. Basically, the teardown function<https://github.com/scikits-image/scikits-image/blob/master/skimage/io/tests/test_tifffile.py#L19>of the test is trying to reset all the io functions to their defaults. But, it turns out that the default for 'imread_collection' is empty on my system. I'm not sure if 'imread_collection' should be empty (the fits plugin seems to be the only one that explicitly states that it reads collections and I don't have pyfits installed), but the teardown function should be able to handle that case. I've fixed the test error in PR 195<https://github.com/scikits-image/scikits-image/pull/195> . Are there any other plugins that should explicitly state that they provide 'imread_collection'? I can run `skimage.io.ImageCollection` but not `skimage.io.imread_collection` so presumably some other plugin(s) can read image collections. -Tony