Scott,
I am unable to replicate this issue in your test portal, but have been able to determine the following (which I am most certain is controlled by your code, not our skin or otherwise).
When viewing HTML source of product detail when logged is as host/admin, the following code is rendered:
<div id="dnn_ctr990_ProductDetails_TabContainer1" class="google" style="width: 830px; visibility: hidden;">
When viewing HTML source of product detail when not logged in or as "normal" user, the following code is rendered:
<div id="dnn_ctr990_ProductDetails_TabContainer1" class="google ajax__tab_container ajax__tab_default" style="width: 830px; visibility: visible;">
Please take special notice of the style visibility ("hidden" in one and "visible" in another). Does your code control this? Thanks for taking a look into this.
David