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I have a slight problem with the one-line change.  If you
look at the logic (and comment), you have an unhandled case.
 Basically, the comment at line 196 states "# edit query -
make sure we get an exact match on the name".  What happens
if we don't have an exact match on the name?  Right now it
does nothing.  So if the form has an old_queryname, but it
does not match any current name, this code does nothing.  It
does not print an error, or save a query.  It falls through
to the "add it to the user's query multilink".  Now this
error condition MAY not be possible to create, but it
appears that there still is an error in the logic here.  So
the one-line change should fix the general problem but does
not totally eliminate the bug.