This is an urgent update to address a crashing issue with the "adds up to" validator.
The problem was caused by an API change in Webform added in commit db57067 and first released in 7.x-4.0-rc6. A function name was changed. Webform Validation called the old function, resulting in a WSOD.
7.x-1.7-rc1 released as 7.x-1.7. Changes since 7.x-1.6: