Our app can open its own native file format, and also another standard file 
format. The second format is listed in the file types of the app, and the role 
is set to 'viewer' rather than 'editor'. When this file is opened, a normal 
document is made but the contents of the file are converted to our internal 
format. Later, the user would want to save this using the app's native format.

Unfortunately on Lion, the autosave feature overwrites the original file, 
destroying it, and replacing it with our native format, but with the wrong 
extension (it has the original extension).

Shouldn't setting the role to 'viewer' prevent this? Otherwise what should I be 
doing to avoid this annoying problem?

--Graham



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