glibc-2.2 => glibc-2.2.x

Hi, I installed SuSE 7.1, which is based on glibc 2.2. I have learnt that my Fortran 90 compiler does not run with this version, but it does with anyone previous or newer. Trying to update glibc from 2.2. to 2.2.3 has led to disaster when I follow the instructions of the howto. Has anyone done it? How can I solve the problem, anyway? Alberto.