[Plugin: Postie] Posting images from Mail.app does not work

Hi there,

I’m experiencing a strange behaviour with the Postie plugin: Posting pictures from my mobile android device (K-9 Mail) works fine, Gmail ditto. Images are displayed as a gallery.

Whereas, when I’m trying to post from my Mac with Mail.app (version 5.1, OS X Lion), the images get stripped off. The post appears, but not the attachments.
If I change Postie to prefer HTML rather than plain text, the photos appear inline and distorted.

I’m using the new standard theme twenty eleven on WordPress 3.3 (German Edition).

Cheers,
titus