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As there are more file extensions than Dropbox recognizes, I have previously suggested that Dropbox examines the file content for ascii. As no action has been taken on Dropbox side to resolve, I now ...
Walter
I now have the option to open un-recognized extensions as text file. I am very happy with the option to view, search and edit text files on the iPad. Thanks to the Dropbox team for implementing this feature! Very helpful in my work.
Terry