I'm noticing that under CentOS 6, emacs fundamental mode is no longer inserting tabs at factor-of-8 tabstops, but rather is doing some funky guess-the-intended-tab-distance thing like text mode has done for a while, currently using three spaces per tab key.

Has anyone tracked down where this was changed and, more to the point, how to get the old CentOS 5 behavior back?

FWIW, I'm invoking it as "emacs -nw filename". LANG is "C".

Devin