Hi, I have post this in k2mart forum, but since SIGP is involved,  think it'd be better that I post here too.
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k2mart & SIGP are both from joomlaworks, I thought they would work with each other smoothly.
But please take a look at this page:
74.220.215.205/~tribecaf/index.php/testatomic

In this k2mart item page, when I insert SIGP as product gallery, all links from k2mart become unavailable. If I take away SIGP, k2mart would work fine.

By the way, I think this problem has a same cause as the problem I described in forum.joomlaworks.net/k2mart_2x/tab-'product-reviews'-unclickable/
On the link I provide above, use test2/123456 to login, you will see the login module appearing at the bottom of the page. If you use test3/123456 to login, the login module will still be in the right sidebar; but if you summit a review, the login module will also be at the bottom.

Please take a look into these problems. I can provide super user access if you need.