Unless you're certain that the problem is fixed by upgrading to the new version (and isn't due to differences in environment, configuration, which packages are installed, etc), sticking with the distribution-provided version is usually the easiest way to go. There is no automatic way to upgrade to a newer version: you get the version that was current at the time of your distribution's release, with patches for security and bug fixes as required.
You might want to check out the
Debian bug tracker, since this sounds like it could be a bug.
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