pculture/miro — pull request #284 by paulswartz (2012-03-21 16:48:35+00:00)
Title: bz18886. YouTube icon filenames not unique enough

The YouTube thumbnail URLs all have a filename of 3.jpg. Since
`next_free_filename` only uniquifies filenames so many times, if we get a short
filename now we use the whole URL for the filename.