I am having the same problem that has been discussed with no resolution at breakmyzencart.com. I cannot find a similar discussion here.

When using IH2 with Firefox I have no problems. However, with IE6 the first few image pop-ups (near the top of the page) work fine but as you move down the page they seem to popup either far away from the original/base image or mostly not at all. I think when they don't popup at all they may be popping up but just not on the visible part of the screen.

Any and all ideas would be greatly appreciated. Thanks in advance.
Using the latest version on the zen-cart downloads 2.0v0916 with zen-cart 1.3.7
Problem can be seen HERE (in ie6).

As you move down the page, the problem starts at row 4.
Where the images appear below the cursor they appear ok.
When they are forced to appear above the cursor they progressively move higher up the page until they disappear off the top of the page.

I have also had a quick look at 6 sites in the Showcase using IH2 and they all show this same behaviour.

Not sure if its related but HERE they discuss a bug in javascript in ie6 that might be a problem.

Regardless, does anyone have a solution to this problem in ie6?