closes #1824

src/user/delete.js

@@ -60,7 +60,7 @@ module.exports = function(User) {
 					db.deleteObjectField('userslug:uid', userData.userslug, next);
 				},
 				function(next) {
-					db.deleteObjectField('email:uid', userData.email, next);
+					db.deleteObjectField('email:uid', userData.email.toLowerCase(), next);
 				},
 				function(next) {
 					db.delete('uid:' + uid + ':notifications:read', next);

src/user/profile.js

@@ -115,7 +115,7 @@ module.exports = function(User) {
 				return callback();
 			}
 
-			db.deleteObjectField('email:uid', userData.email, function(err) {
+			db.deleteObjectField('email:uid', userData.email.toLowerCase(), function(err) {
 				if (err) {
 					return callback(err);
 				}
@@ -128,7 +128,7 @@ module.exports = function(User) {
 						User.setUserField(uid, 'gravatarpicture', gravatarpicture, next);
 					},
 					function(next) {
-						db.setObjectField('email:uid', newEmail, uid, next);
+						db.setObjectField('email:uid', newEmail.toLowerCase(), uid, next);
 					},
 					function(next) {
 						User.setUserField(uid, 'email', newEmail, next);