I bumped into problems with SVN revision 261. It added tkescaping to tk-princ, where there previously was none. This change broke part of treeview-heading. A patch to make treeview-heading work with the new tk-princ is attached. example: (tk-princ "{stuff}") old result: "{stuff}" new result: "\{stuff\}" new code for old result: (tk-princ '("stuff")) The docstring for tk-princ says "Like princ (format ~a), but convert a lisp list to a Tk list." but the code is now very different. Should the docstring change to match the new code, or should the code be reverted to match the docstring? Thanks, Daniel