User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0 Build ID: 20111104165243 Steps to reproduce: receive messages Actual results: message does not show the attachment Expected results: message should show the attachment

Regression window: Works: http://hg.mozilla.org/comm-central/rev/9524920e2c14 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7pre) Gecko/20101006 Thunderbird/3.3a1pre ID:20101006032808 Fails: http://hg.mozilla.org/comm-central/rev/afb7f32df77e Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b8pre) Gecko/20101007 Thunderbird/3.3a1pre ID:20101007035341 Pushlog: http://hg.mozilla.org/comm-central/pushloghtml?fromchange=9524920e2c14&tochange=afb7f32df77e Suspected: b731a64e2504 Jonathan Kamens — fix bug 351224, r=bienvenu, detach of grandchildren with mime multipart alternative

The PDF attachment is incorrectly put into a multipart/related context: > ------=_Part_9513_28698315.1320853697068 > Content-Type: application/octet-stream; name="PW51_09_11_2011.pdf" > Content-Transfer-Encoding: base64 > Content-Disposition: attachment; filename="PW51_09_11_2011.pdf" Thus, the message is strictly speaking malformed, but a bug is pending to allow such constructs again after bug 351224. For the time being, go into Tools > Options > Advanced > General and click Config Editor there. Search for mailnews.display.show_all_body_parts_menu and set it to true by double-clicking on the preference, then View > Message Body As > All Body Parts will allow you to access the PDF attachment.