I have posted at http://www.cardiothink.com/downloads/ a set of patches which, when applied to the latest stable freeradius-client (version 1.1.6) and to the CVS version, fixes the problem with PPTP and radiusclient that results in failure of CHAP authentication with the syslog errors: rc_avpair_new: unknown attribute 11 rc_avpair_new: unknown attribute 25 (The problem, for me, turned out to be blanks at the start of every line in dictionary.microsoft. The patches, among other things, skip the blanks.) Included in the patches is a new program in the src subdirectory that I have named radlistdictionary (you can change it if you like). It is a simple program that uses the installed freeradius-client library to read dictionaries, and it displays the loading and parsing steps explicitly so that you can see where errors are occurring. (This program requires that the library itself be patched to show the parsing.) Fixing problems with the dictionaries is easy once you can see what is going on! Please see the above web site for more details, and let me know of any problems.