martin rudalics writes:
 >  > Your bug17046-e.el also works (ie doesn't cause the bug) for me
 > 
 > Are you sure?  Then we almost found it.  You now have to only find the
 > decisive difference between the last bug17046-a.el or bug17046-b.el
 > version that caused the bug and bug17046-e.el.  To do that please
 > 
 > (1) Make sure you found a version that produced the bug and did not
 >      throw any other error.
 > 
 > (2) From that version one by one comment out a line that is not
 >      present in bug17046-e.el.
 > 
I thought that was the (display . ":0")
line (as in my response to Juanma)?

I'm attaching the version I have with the single line to comment which
removes the bug indicated: