Andrea,
GG looked at an old dump that you had sent and he says the relevant /proc/cpuinfo looks correct there.
How do I give permission to the "proc" even as non-root?
Check permissions on this file via:
ls -l /cat/procinfo
They should be 'r r r' so everyone can read it. Meanwhile we will test (later today though) on Arch here as an ordinary user to see if we can duplicate.