linking files compiled with older gfortran

[kamaraju kusumanchi]

I have previously compiled a bunch of libraries (fftw3, blas, lapack,
lapack95, mpich2, openmpi etc.,) using gfortran 4.3.2. However, due to
a bug fixed in gfortran 4.4.0
http://gcc.gnu.org/ml/fortran/2009-06/msg00116.html I now want to
upgrade to gfortran 4.4.0 . My question is that should I recompile all
these libraries again? or will they work just fine? How good is the
gfortran's backward compatibility?

thanks
raju