diff -r e501806ab489 -r 37968502da70 web/views/treeview.py
--- a/web/views/treeview.py	Wed Jun 16 09:53:17 2010 +0200
+++ b/web/views/treeview.py	Wed Jun 16 12:24:11 2010 +0200
@@ -142,7 +142,7 @@
         cookies = self._cw.get_cookie()
         treestate = cookies.get(treecookiename(treeid))
         if treestate:
-            return str(eeid) in treestate.value.split(';')
+            return str(eeid) in treestate.value.split(':')
         return self.default_branch_state_is_open
 
     def cell_call(self, row, col, treeid, vid='oneline', parentvid='treeview',