[gembud] libgfortran.so.1 not found

I installed the gempak 5.11 binary on my 64-bit system running kubuntu.  I
added the gfortran-4.3 package, too.  When I try to run something like
gdcntr or gdplot2, I get a message saying that the libgfortran.so.1 file
doesn't exist.  The message is right because I only have libgfortran.so.3
where the .so.1 version should be.  How do I get around this?  Can I just
rename the file?