Hi Michael,

I now think it is in fact a sage bug. Harald schilly had a slightly different
version of that a month ago or so (with ecl or ecls in Gentoo speak).

The problem is that you are in the sage environment and LD_LIBRARY_PATH
set by sage is hiding the system libgd. If you look at the system libgd:
objdump -T -C /usr/lib64/libgd.so.2 | grep gdImageCreateFromJpegPtr
You should that see the symbol is defined:
00000000000168a0 g    DF .text  000000000000003b  Base        
gdImageCreateFromJpegPtr

But if look at 
objdump -T -C ${SAGE_ROOT}/local/lib/libgd..so.2
You won't get anything because by default gd is compiled without
jpeg support in sage.

Francois

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