At that time of upstream version freeze (UVF) for 6.06 LTS, 5.21.4.10.8-4ubuntu1 was in the 6.06 LTS repository.
6.10 currently has 6.1-2ubuntu1, so if you have a dire need for this newer version, you can build the source package in a 6.06 LTS pbuilder. -- why still 5.21 version ? https://launchpad.net/bugs/57613 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs