Iframing is strongly discouraged by Ogone. Users will not see if it is an HTTPS connection or not. It allso will have the same issue as popup, the parent window has to be reloaded by javascript.

It supposed to close the popupwindow and reload the "opener" window to the checkout comlete screen by javascript.
This is why cart/checkout/ogone_popup_ok is caled.

If cart/checkout/ogone_popup_ok loades your homepage, this is where it goes wrong. Do you have clean urls?
Maybe there is a menu caching bug in the module (i cannot imagine, since the cart/checkout/ogone_popup_ok path is static).

Again, cart/checkout/ogone_popup_ok should NOT open your homepage!

Please download form drupal.org DONT use any comment attachments, they are old.

Regards,

Kees