[Fedora TeX Live] Again problem with formats.

[Rudi Gaelzer]

Today, after I installed the latest updates for Fedora TeXlive, I ran again 
into the following problem, which is becoming somewhat frequent lately:

===============================================
This is pdfTeX, Version 3.1415926-2.5-1.40.13 (TeX Live 2013/dev)
 restricted \write18 enabled.
---! /home/rudi/.texlive2012/texmf-var/web2c/pdftex/latex.fmt doesn't match 
pdftex.pool
(Fatal format file error; I'm stymied)
================================================

I'm still trying to remember what I did last time to solve this problem.  I 
anyone out there could help me out here, I'd be grateful.

-- 
Rudi Gaelzer
Department of Physics
Institute of Physics and Mathematics
Federal University of Pelotas
BRAZIL
Registered linux user # 153741