This post is actually to solicit feedback from other DMX 5 users.

On my DNN 4.9.1 site, I have found after installing .NET 3.5 SP1, and making no other changes, everything continues to work correctly, including the DMX AJAX UI.

However, once I make other mandatory changes to web.config to switch DNN in general to AJAX version 3.5, the DMX AJAX UI ceases to function, with lots of page load errors. (Also, you must delete the old System.Web.Extensions.dll from the DNN\Bin folder to eliminate general DNN errors).

Has anyone else experienced this problem when swithching to .NET 3.5 with DMX 5?  If, so, have you been able to determine a work around?

Thanks for anyone's feedback.