Sure enough, there's an error in the file. It appears I have the same macro command name in 2 different files.
The error is mine, but the reporting could be a bit clearer. Just opening a file isn't much of an indication of an error.
Also, it would be really nice if the "user-loaded modules" dialog would let you open macro files directly from the list. As it is now, the dialog is modal (ick) and I have to note the path to the macro, close the dialog, then open the macro. An 'open' button, or right-click option would be really handy there.
-Tim