I assume that yo are using somethig like opener.location.reload()
. Instead of this try to redirect the opener page to the same address:
Popup page:
<script>
window.onunload=function(){
opener.location.href = '/{!$CurrentPage.parameters.openerId}';
};
</script>
Of course you need to notice the opener page ID in the popup URL. For that just insert that ID to the Custom Button code that opens a popup, somethid like this:
Custom button code:
newPopup = window.open("/apex/PopupPage?openerId={!Object__c.Id}", "myPopup",
"width=300,height=200");
newPopup.focus();
na1.force.com
!=namespace.na1.force.com
both are different. Browser won't allow it.