Shutter 4.3 has been released. This is a highly recommended update.
Summary of changes:
Improved Battery event. Added new trigger conditions: Power supply state; Battery level above a specific level; Monitor either the battery level or the power supply state, or both.
Improved Ping event. Added ping interval parameter, increased default timeout and fixed incorrect API handling.
Added new languages: Dutch, Slovenian, Simplified Chinese, Portuguese.
Major efficiency improvements for working with very large sets of events and actions, including a significantly decreased memory footprint.
Fixed several important issues.
For more information, see the changelog between Shutter 4.2 and 4.3.