Previously when processing conditions they were taken from database with "order by conditiontype" and this block of code was working correctly:

case CONDITION_EVAL_TYPE_AND_OR:
				if (old_type == condition->conditiontype)
				{
					if (SUCCEED == condition_result)
						ret = SUCCEED;
				}
				else
				{
					if (FAIL == ret)
						goto clean;

					ret = condition_result;
					old_type = condition->conditiontype;
				}

				break;

Now, in 3.0, conditions are taken from configuration cache where they, seems, are sorted by "conditionid" instead of "conditiontype".

If a condition type A will be evaluated to FAIL after evaluation of another condition type B, then that FAIL simply overwrites possible SUCCESS of earlier evaluated condition type A.

As a result - an action which worked in 2.4 stops to work in 3.0 (for sure!) or vice versa (I guess).