I am having a problem with custom general rules for deduping. Very inconsistent results that cause me to suspect that there may be significant issues. One strange observation is that at times a general clearing of caches makes a difference. But even that is not consistent and problematic if a rule is being used by a webform, for example.
Are users have success with general rules? Failures? My test case is using First Name, Last Name and birth date. Is this a case where a general rewrite is needed and perhaps a Make It Happen campaign?