Blank popup is shown for non-iframe colorbox link

Hi all,

Thanks for this great module. however i have a question about user the colorbox-load link. I want to display the node view page (i.e. node/[nid]) in colorbox so i create the following link.

<a href="node/1?width=960&height=720&iframe=true" class="colorbox-load">View</a>

It works great. but if i removed the iframe=true.

<a href="node/1?width=960&height=720" class="colorbox-load">View</a>

The popup window display a blank content. Actually i am fine with the iframe but i just wonder what is the difference between iframe enabled and iframe disabled.

Thanks.

Regards,
Kit