Hi Harald,
> On Jan 12, 2018, at 6:54 PM, Harald Jörg <harald.jo...@arcor.de> wrote: > > Hello libwww, > > I've encountered a situation where browsers "just work" but > LWP::UserAgent fails. > > This is a border case which apparently went unnoticed for decades, and > for my own problem I've found a ridiculously easy workaround. So I'm > not sure whether it is a good idea or worth the effort to change > things. I volunteer to create a test case but am hesitating with a > fix because this might break things in the real world. Thanks very much for this detailed explanation of what you've been seeing. I don't really know this part of the code well enough to be able to comment on this right now, but there was a recent pull request which deals with authentication. Does https://github.com/libwww-perl/libwww-perl/pull/255/files fix anything for you? If it does or it doesn't, it might be worth commenting on the existing pull request. Best, Olaf