Files written using Visio 2003 (from Office 2003) cannot be read from the Enterprise Architect version of Visio that comes with Visual Studio 2003. The latter appears to be compatible with Visio 2002, so if you save files in that format, all is well.
... until the collector arrives ...
This "blog" is really just a scratchpad of mine. There is not much of general interest here. Most of the content is scribbled down "live" as I discover things I want to remember. I rarely go back to correct mistakes in older entries. You have been warned :)