There are some known issues with the screener not displaying properly in Internet Explorer (versions 6, 7, and 8). They are fairly minor - the close button may not be aligned properly or the text size could be too large. In all our tests ethnio screeners work great with IE9+. The first thing you can do to make sure your screeners display properly is to make sure you are using the "default" theme under screeners >> design, which uses the most traditional code structure.
Please do email us a screenshot of any IE screener display issues you run into and we'll work to fix them. Also note that logging into ethnio as a researcher, you do have to use Chrome, Firefox, or Safari - we don't support IE on the app side, although of course we want our screeners to display perfectly for as many people as possible. Thanks for your understanding - we're committed to working through the trickery that is IE.