Some RegExp bugs have now been fixed in Rhino. Removing the testcases from the skip list.

js/tests/rhino-n.tests

@@ -46,11 +46,6 @@ js1_5/Regress/regress-89443.js
 js1_5/Regress/regress-90445.js
 #Rhino doesn't implement the (non-ECMA) toSource() method
 js1_5/Regress/regress-44009.js
-#Skip this test until the corresponding bug is fixed
-ecma_3/RegExp/regress-78156.js
 #Skip these two; see http://bugzilla.mozilla.org/show_bug.cgi?id=81086
 ecma_3/Statements/regress-74474-002.js
 ecma_3/Statements/regress-74474-003.js
-#RegExp bugs currently in both SpiderMonkey and Rhino
-ecma_3/RegExp/regress-72964.js
-ecma_3/RegExp/regress-87231.js