Message 224876 - Python tracker

I've only had a couple minutes to look into this so far, but the bug does indeed seem to be valid across all versions. In fact, the line "# XXX The stuff below is bogus in various ways..." in urljoin tipped me off to something potentially being askew ;)

Unless the OP wants to provide a patch, I was going to take a look at possibly updating urljoin (at least the part below that line) to follow http://tools.ietf.org/html/rfc3986#section-5.2 a little more closely.