Really remove cookie whether it's created with an default domain or not

src/jquery.cookie.js

@@ -110,8 +110,26 @@
 		}
 
 		// Must not alter options, thus extending a fresh object...
-		$.cookie(key, '', $.extend({}, options, { expires: -1 }));
-		return !$.cookie(key);
-	};
+		options = $.extend({}, options, { expires: -1 });
+
+		$.cookie(key, '', options);
+		var succeeded = !$.cookie(key);
+
+		// Browsers distinguish whether the default (=current) domain
+		// is explicitly passed or not, so try hard to remove by the
+		// opposite approach.
+		if (!succeeded) {
+			if (options.domain && options.domain === location.hostname) {
+				delete options.domain;
+				$.cookie(key, '', options);
+				succeeded = !$.cookie(key);
+			} else if (!options.domain) {
+				options.domain = location.hostname;
+				$.cookie(key, '', options);
+				succeeded = !$.cookie(key);
+			}
+		}
 
+		return succeeded;
+	};
 }));

test/tests.js

@@ -328,6 +328,32 @@ test('[] used in name', function () {
 	strictEqual(document.cookie, '', 'delete the cookie');
 });
 
+test('with no domain options for set and remove', function() {
+	expect(1);
+	$.cookie('c1', 'v');
+	strictEqual($.removeCookie('c1'), true, 'returns true');
+});
+
+test('with domain option for set and none for remove', function() {
+	expect(1);
+	var options = {domain: window.location.hostname};
+	$.cookie('c2', 'v', options);
+	strictEqual($.removeCookie('c2'), true, 'returns true');
+});
+
+test('with no domain option for set and one for remove', function() {
+	expect(1);
+	var options = {domain: window.location.hostname};
+	$.cookie('c3', 'v');
+	strictEqual($.removeCookie('c3', options), true, 'returns true');
+});
+
+test('with domain options for set and remove', function() {
+	expect(1);
+	var options = {domain: window.location.host}
+	$.cookie('c4', 'v', options);
+	strictEqual($.removeCookie('c4', options), true, 'returns true');
+});
 
 module('conversion', lifecycle);