Hi SvOlli
"Illegal instruction" occurs then a code is compiled/optimized for a more advanced architecture than it's running on (e.g. running code compiled with optimization for i686 (like the "Core" architectures) but it's running on a i486.
That statement seems to suggest that Core is compiled for i686 and above.
If it does, I'm sorry. That's not what I meant. Since there are several different TCE build systems around, aside from the TCZ that were build "by hand", I just wanted to state, that I can't tell for others. I could even only tell for mine after looking in the scripts. ;-)