User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.1) Gecko/20060214 Firefox/1.5.0.1 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.1) Gecko/20060214 Firefox/1.5.0.1 when receiving mails containing "web-bug" images or css files (images loaded from external sources, used to track the reader of the mail), they are normally blocked; if you reply to them or forward them, the images are loaded without asking the user. in my opinion, this is not what a user would suspect. Reproducible: Always Steps to Reproduce: 1. send an html email containing an image loaded from https://www.mozilla.org/images/header_logo.gif 2. view it: graphics will be blocked according to your settings 3. forward it: graphics will be shown, ie loaded using thunderbird 1.5.0.1 gentoo build

*** This bug has been marked as a duplicate of 263345 ***