If you look at mozilla’s crash reported and peek at the crashes Thunderbird get, you’ll see that the number of crashes is very low on Linux. That’s because people use the packaged version of Thunderbird on Linux which is slightly different from the official release one (so they don’t give us build symbols and disable the crash reporter). So from a QA and dev perspective we are loosing a lot of crash information , because we think we have a good Linux installed base. This is about to change, as one of the Major Linux distribution (SUSE Linux and it’s sister openSUSE) are about to send us all those crashes that are happening. This won’t be in the 11.3 releases per-se, but it will be from any update package that user will install from now on. Thanks Wolfir for making this happen !