Contact the packager
There needs to be a "Contact the packager" button, somewhere where its easily accessed, like on your hda dashboard under the applications tab (when you click on the app) and in the http://www.amahi.org/apps/ section, one for each app.
This button will take you to a contact form for the packager (gets it from the "This app was packaged by" section and, when submitted, sends them an email.
BUT THE USER SENDING THE EMAIL DOES NOT SEE THE PACKAGERS EMAIL, and vice versa. Maybe a masked email to reply to, if thats not too much. I think the packagers are pretty trustworthy, ide think atleast.
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