Linuxconf has the wrong locations for ipx_interface and ipx_configure. They are now in /sbin, but linuxconf looks for them in /usr/bin. Bugs 6252, 6301, and 6606 are related to this one. They pertain to the same problem with the initscripts package.
Nice catch. This will be fixed in linuxconf-1.17r2-3, which should be in the next version of Raw Hide.