erc: ensure erc-fill is added after coloring nicks
auto-complete: flyspell workaround doesn't work with flycheck

And the workaround for flymake doesn't work either.
auto-complete: disable auto-complete for now
auto-complete: try a workaround for flycheck

This doesn't work. :(
gnus: specify signature in all identities

When switching from one identity to another, only stuff in the current
identity are applied.