From Bugzilla Helper: User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.1-ac8 i686) refering to the man-Page: -m, --machine print the machine (hardware) type -p, --processor print the host processor type m prints the i686, p prints unknown. Reproducible: Always Steps to Reproduce: 1. login in 2. uname -p 3. ;-)
This is intentional. It's the same thing as the second part of the autoconf host type (usually i686-unknown-linux). The -p distinction is used only on some very odd architectures.