This new version of Jetpack bring some new improvements, specially on the PHP incompatibilities such as:
- Fixed a bug that prevented activating/deactivating of some features in PHP versions below 5.4.
- Removed an unused function that was also incompatible with PHP versions below 5.4.
- Fixed a bug that was causing a blank Jetpack admin area.
You can upgrade to the newest version in your website updates section or you can upload it on the server after you download it from here.