In Outlook 2011, I've noticed that double-clicking a JPG file from an email opens the default JPG viewer - in this case, Preview. Apparently, any document you open from Outlook 2011 is automatically 'Locked' - you can Get Info on the file in the Finder to see this automatic behavior. After it opens in Preview, saving the JPG out to any folder, especially the Desktop, returns an error saying: The document "nameofdocument.jpg" could not be saved as "nameofdocument.jpg". You don't have permission. To view or change permissions, select the item in the Finder and choose File > Get Info.

It doesn't seem to do this with PNGs, even though they too are locked by Outlook 2011 when opened from the email by double-clicking.

Now, I can drag it out of the email to the Desktop without issue as well as right-click the attachment and choose Save As..., but double-clicking, opening with default JPG viewer and saving from there always returns the above issue. Several others I know have reported similar behavior.

Any ideas?