Thanks Daniel,

> readelf -wF is probably your best bet.  But is the only problem the
> fact that the backtrace didn't stop at _start?

I've seen worse stack traces than this on the Opteron, particularly one
that had Lustre kernel patches applied -- but I don't know if that was
related..  I'll keep an eye out for further problems.

I figured that the "Incomplete CFI data" might be an issue.  I don't
know enough about this area yet to do anything..

> You might want to investigate why the backtrace didn't stop earlier, at
> main or at a fortran entry point.  GDB may be confused about
> main_name().

Attached is the readelf -wF info, can you see anything wrong with the
0x040d7ad entry?

ta,
David