When I edit a .tex file with emacs, tex-mode does not load (no syntax highlighting, no LaTeX-specific commands). When I do M-x tex-mode by hand, I get Symbol's function definition is void: flyspell-mode-noerr in the status line. This is very annoying, because I spend much of my time editing LaTeX files in emacs.
You probably have an incorrect ~/.emacs that tries to load flyspell when using tex-mode and reference an undefined function in the current version of flyspell, because there's no mention of flyspell-mode-noerr in /usr/share/emacs files.
Would you mind testing with emacs -q and try again. I also suspect a bad configuration in your .emacs file
(In reply to comment #2) > Would you mind testing with emacs -q and try again. > > I also suspect a bad configuration in your .emacs file > Yes, this problem had been resolved long ago. I had a ~/.emacs file left from another Linux distro; it was incompatible with Gentoo.
Why then is it still an active bug ? I guess you can close it.
This was a bug in my ~/.emacs file