www.dl2rum.de

I had used a password ending with & on QRZ. When I entered that password into RumLogNG, it failed to connect and gave me an "incorrect login" error. When I changed my QRZ password to one that does not end in &, the QRZ lookups work fine.

I'm in no particular hurry for a fix, but wanted to share in case anyone else might appreciate the workaround.

Thanks for the hint. It's a known problem for nearly all services where a password is required. I'm not sure, if I made a note somewhere.
There is no fix yet and I'm not sure if a fix is possible.