Rated 5 out of 5 stars

le I_am_a_Landstander ar MFómh. 28, 2010 ·

Beta3 prevents attachments from being opened. Stick with the v1.2.4.
Edit: Tested 1.4.0 Beta1. I can confirm this issue is fixed (either by author or tbird update.)
Upgraded rating to 5 stars. Mozilla should have made this a feature.

Léirmheas ar leagan níos sine den bhreiseán seo (1.2.4).  Rinne an t-úsáideoir seo léirmheas ar an mbreiseán seo cheana.

le jmozmoz (Forbróir) ar DFómh. 23, 2010 ·

Subject says it all: This bug seems to have been disappeared with the release of Thunderbird 3.1.5. Could you please check.