Erm... we never were very reliable with the version numbers in the releases. Chances are, if it says 1.0.x, you're running 1.0.(x+1)
Most reliable way is to check the zen/changelog.html included in the release; that's usually up-to-date. The latest one is what you're running.
In any case, upgrade to 1.0.3. It's a good one.