I just tested this on my laptop running Gutsy.
Could not reproduce the error. Are you running on x86_64 or x86?
Output as follows:
write(*,*) 'hello world'
Hope that helps
zbrown[~]$ gfortran -g test.f
zbrown[~]$ gdb a.out
GNU gdb 6.6-debian
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This GDB was configured as "i486-linux-gnu"...
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
Starting program: /home/zbrown/a.out
Program exited normally.