Hide Attachments (#) link when using thumbnails

If the Generate Thumbnail for uploaded picture option = Yes, it would be nice if the Attachment (#) link at the bottom of a post was not displayed for any attachments that are displayed as thumbnails. The link simply duplicates the behavior of the thumbnail (while requiring an extra step), and it confuses some users.

If the attachment is a document (something that is not displayed as a thumbnail), then the Attachment (#) link should still be displayed.