If you change the canvas size on startup in Fireworks MX2004
to centimetres instead of inches, then document cannot be saved. It
errors - "Could not complete your request. An internal error
occurred." - as described in the Adobe knowledgebase. However, if
after changing to centimetres you change the values to integers
(instead of floating point), it saves ok.
I just wondered if anyone else has had the same issue.