Any ideas on what is causing this? Any reason to be concerned?
Here is the resulting gnetlist.log file:
gEDA/gnetlist version 20070526
gEDA/gnetlist comes with ABSOLUTELY NO WARRANTY; see COPYING for more details.
This is free software, and you are welcome to redistribute it under certain
conditions; please see the COPYING file for more details.
Remember to check that your schematic has no errors using the drc2 backend.
You can do it running 'gnetlist -g drc2 your_schematic.sch -o drc_output.txt'
and seeing the contents of the file drc_output.txt.