silverstripe/silverstripe-framework — pull request #2718 by kmayo-ss (2013-12-11 21:29:38+00:00)
Title: BUG: #2503 Fixes performReadonlyTransformation for OptionSetField

OptionSetField is using setValue in the method performReadonlyTransformation, which does not set the option values changed to use setSource to match DropdownField which it inherits from

See the following issue for more information

https://github.com/silverstripe/silverstripe-framework/issues/2503