It seems that ownCloud developers tagged a new release on GitHub but never released it on their website (from where we download the actual script). But, we were checking for new releases on their GitHub page, which is wrong. I have updated the script to check for new versions on the same website from where the script is downloaded. This is my bug, by the way, and it fixed now.
Note: The latest ownCloud is 10.9.1. 10.10.0 is only upcoming.