Page state is getting corrupted, "The state information is invalid for this page and might be corrupted..."
This can either occur on TabSelectedIndexChanged (with the load occurring) or on postback for the individual tab.
Thanks
Hello mccreadiegroup,
UltraWebTab is a part of the old toolset and it is not supported. More information about supported environments is avaiable at: http://ko.infragistics.com/support/supported-environments.aspx#SupportedEnvironments
Just to clarify do you mean WebTab? If you are using WebTab then I would recommend you to download and install latest service release 2120.