I recently upgradded from NetAdvantage 8.1 to 8.3. I upgraded my VB.NET 3.5 project in VS2008 to use 8.3 and everything works fine. However, if I add an Ultra control from the toolbox onto my form, VS2008 adds an 8.1 reference, which ends up resulting in an ambiguous reference since both 8.1 and 8.3 references are present. I have to manually delete the 8.1 references over and over again.
Your toolbox probably still has the 8.1 version of your controls in the Visual Studio toolbox.
If you haven't already done so, I suggest you run the Toolbox Utility from the menu entry for 8.3, to make sure that the 8.3 controls are in your toolbox. After that, you need to remember to add only 8.3 controls to the form where you already have 8.3 referenced, since you'll have separate toolbox tabs for 8.1 and 8.3. (Grabbing the wrong version of a control is a mistake I've personally made many times.)
If you're no longer using the 8.1 controls, you might also want to remove the tab from the toolbox, so that you won't grab one of those controls by accident.
That did the trick. I'm pretty sure I ran the toolbox upgrade before (I recall seeing the new 8.3 toolbox icons before) so not 100% sure what the deal is with that. Regardless, all seems A-OK now. Many thanks.