After the upgrade, when I run the latex or pdflatex commands I get either get cannot find latex.fmt or pdflatex.fmt respectively. I think this is a problem with the teTeX configuration; however, I am not that smart on setting up teTeX. I just use it. With RH 5.1, it just worked. With 5.2 it doesn't work...
this one's for you, Cristian.
*** This bug has been marked as a duplicate of 119 ***