I just switched to a new Linux distro (Debian 2.2r3 from Mandrake
6.something). Somehow, the \columnbreak command that worked before now works
no longer (i.e., documents that were written under the old distro don't work
under the new distro). I have returned to the documentation for multicols,
but find no mention of the command, nor do I recall where I originally found
it. Is this command part of another package on which multicols optionally (?)
depends? What could be the reason for the break, and what is the fix? Or how
should I go about investigating?