Stellarium crashes soon after start up.

I had used stellarium for a week or two without trouble, then I installed opera (deb file downloaded from opera.com). Thereafter stellarium was unuseable - it crashed with a segmentation fault. After trying re-installation and uninstalling opera, reboots and even trying a newer version of of stellarium (11.2), it still crashes with the same message. I have returned to 11.0 from the Ubuntu Precise repository without any change. When called from the keyboard the report is: stellarium: ../../intel/intel_bufmgr_gem.c:1579: do_bo_emit_reloc: Assertion `offset <= bo->size - 4' failed.

I can provoke the crash by searching for the moon and then reversing time. Just now, (11:30 BST) I went backwards quite quickly and it froze at 04:23 BST, a minute or so later I repeated the operation and it froze at 04:38 BST. It does crash under other circumstances, but this is an easy way of getting it to happen.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: stellarium 0.11.0-1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
CheckboxSubmission: 09fa59179f252714fef988412f7b761d
CheckboxSystem: b1865df84255b8716d3bcc269ff410d1
Date: Sat May 12 11:14:03 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120328)
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: stellarium
UpgradeStatus: No upgrade log present (probably fresh install)