Hi, not sure if it's known issue that webcombo v10.3 is not working in IE9? When you click on drop down image and try to select the item it selects (higlighted) every item in the dropdown list and doesn't allow to choose an item.
Hello Richmond,
The service release 10.3.20103.2120 supports IE 9 and Firefox 4. The latest service release is available for download (NetAdvantage 2010 Vol. 3, 2, 1). The below link from our website will give more details on this:
<https://es.infragistics.com/community/blogs/b/taz_abdeali/posts/ie9-and-firefox-4-support>
As such, I would recommend you to download latest service release from our website and upgrade your project to the latest service release if you are not using that service release.
Update me if you have any further questions with this matter.
Thanks,
Bhadresh