1.6.x is very broken at the moment following changes made in 0edaf336 (Remove most of strcpy, sprintf and strcat)
Several instances of strcpy were replaced with ones specifying an incorrect length which didn't include the NULL terminator. This breaks features such as CDS Browse as the created urls contain two characters of junk from previous strings.
See https://www.mythtv.org/pipermail/mythtv-users/2013-October/354498.html
This was reported back in May on your mailing list along with some other serious bugs: https://sourceforge.net/p/pupnp/mailman/message/32290824/
Hi Gbee,
I have missed that message, thank you for reporting, the patches have been committed.
Regards,
Marcelo.