fields layout is broken if dynamicfields plugin enabled

[uray]

the field totalhours is replaced from input field to simple text in hours.py, this will confuse DynamicFieldsPlugin, following is my quick fix:

Index: branches/0.11/trachours/hours.py
===================================================================
--- branches/0.11/trachours/hours.py    (revision 10223)
+++ branches/0.11/trachours/hours.py    (working copy)
@@ -318,11 +318,12 @@
             ticket_id = data['ticket'].id
             if ticket_id is None: # new ticket
                 field = '0'
+                stream |= Transformer("//input[@id='field-totalhours']").attr('disabled', 'disabled').attr('value', field)
             else:
                 hours = '%.1f' % (self.get_total_hours(ticket_id) / 3600.0)
                 field = tag.a(hours, href=req.href('hours', data['ticket'].id), title="hours for ticket %s" % data['ticket'].id)
+                stream |= Transformer("//input[@id='field-totalhours']").replace(field)
             totalhours['rendered'] = field
-            stream |= Transformer("//input[@id='field-totalhours']").replace(field)

         return stream

[EmeCas]

I'm trying to reproduce the issue with no success yet. May you please clarify a little better how DynamicFieldsPlugin gets confused?