};
// private
-// safari setMonth is broken
-if(Roo.isSafari){
+// safari setMonth is broken -- check that this is only donw once...
+if(Roo.isSafari && typeof(Date.brokenSetMonth) == 'undefined'){
Date.brokenSetMonth = Date.prototype.setMonth;
Date.prototype.setMonth = function(num){
if(num <= -1){