NOTE: This has been resolved with InstantForum.NET 2010-5.
After installing the latest security update for ASP.NET you may receive the error below when attempting to view a forum within InstantForum.NET 2010-4 or below.
Exception Type: System.InvalidOperationException
Exception Message: The resource URL cannot be longer than 1024 characters. If using a CompositeScriptReference, reduce the number of ScriptReferences it contains, or combine them into a single static file and set the Path property to the location of it.
Exception Source: System.Web.Extensions
Exception Target Site: GetScriptResourceUrlImpl
This problem occurs due to the number of composite script includes within the ASP.NET page. To resolve this problem download the attached Messages.zip file below. Extract the Messages.aspx & ControlPanel.aspx file into your InstantForum.NET root directory. Overwrite the existing files with the new files enclosed within the ZIP. This should resolve the problem.