Comment 29 for bug 849416

The steps I'd start with would be:

* reduce the testcase to something more obvious, like just the text "I'm the text/plain part" "I'm the text/html part" "I'm the attachment description" to be sure that everyone will know what they are seeing

* make sure it's a regression - when I open the .eml in 2.0, I see the same thing I see in 3.0 - and if it is find the one-day window, which will do more good than anything else possibly could

* make sure whether it's associated with having used a profile in 2.0, or with having updated from 2.0, or both, or neither: does a new profile on 3.0 do the same? does a fresh install of 3.0b4 do the same? does a new profile created by the fresh install do the same? does it actually require having installed Lightning (in 2.0, or in 3.0? a particular version of Lightning?)?

* see whether it's Tb-only, or the same in a comparable build of SeaMonkey