v1b1 - eliminated the main source of 403 HTTP errors: some cover art URLs just don't accept to have their "100x100-75" trailing string before the extension removed. In those cases, the program automatically falls back to changing the string to "600x600", rather than removing it entirely. All 403 errors seem to be gone. Also, eliminated the IOError that stops the program when an image has a slash in its name. Only 404 errors are left to remove, and they're not very common at all, nowhere near as much as 403 errors were.