Note: Mail Attachments Iconizer has been upgraded to Attachment Tamer. If you have a license for Iconizer, you can download Attachment Tamer as a free update.

This most likely means that the attachments are included in an rich (HTML) message in a non-standard way. Since Mac OS X 10.5 “Leopard” Mail ignores these attachments. This behavior is not related to Mail Attachments Iconizer.

Workaround: Go to Iconizer preferences, press the option (alt) key and from the top pop-up menu choose Let me decide (advanced). This will add a new option labeled Force showing hidden attachments which fixes the problem. Note that even attachments that are already used in the messages layout will be displayed again below the message body when this option is selected.