Just so we get more information, could you check to see if there is a .crash file in your /var/log/crash directory. If there is, using nautilus, please double click on it to report it using Apport and paste the new bug number here. Then, if it is the same issue Launchpad will automatically mark it as a duplicate of this bug.
And after you do that, please try creating a new user on your system and starting Stellarium when you are logged in as them.
Reuben,
Just so we get more information, could you check to see if there is a .crash file in your /var/log/crash directory. If there is, using nautilus, please double click on it to report it using Apport and paste the new bug number here. Then, if it is the same issue Launchpad will automatically mark it as a duplicate of this bug.
And after you do that, please try creating a new user on your system and starting Stellarium when you are logged in as them.
Thanks!