Assuming that this issue was reported, it will be fixed in a service release where IE 9 was supported. IE 9 is supported in volume release of 10.1 and later I believe. I'd suggest upgrading to the last SR of 11.1, as this is the last release with the classic controls before they were retired.
regards,David Young
CLR 3.5 is supported all the way up to the current version, 12.1. As is CLR 2. CLR 4 was added in 10.1, I think.
-David
I am getting the below script error when I try to collapse the nodes in UltraWebTree. Version and dlls details are given below.Infragistics.WebUI.UltraWebNavigator.UltraWebTree, Infragistics4.WebUI.UltraWebNavigator.v11.1, Version=11.1.20111.2178, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb Unable to get value of the property 'margin': object is null or undefined
The issue exists in IE 9 only.