According to http://ubuntuforums.org/showthread.php?t=1442764 this is a problem of thunderbird itselves, and the following package will provide a workaround: https://addons.mozilla.org/en-US/thunderbird/addon/12523.
I did not read the source code of this addon, but it seems like the add- on uses gnome's gnome-open program which tells gnome to act as if someone double-clicked on the file in nautilus. -- Some attchments (.pdf, .xlsx) don't have open dialog just save dialog https://bugs.launchpad.net/bugs/593459 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
