Nathan,

>This fixed the problem. It also introduces a bug/feature where no instance of a control can have the same name as it's class. This is good practice anyway, I guess...
>
>Is this a good work-around, or will this introduce problems that I haven't foreseen?

I've got an alternate solution that doesn't have this "bug/feature". Try this code instead (it's a partial method as was yours):

if (control is Control)
{
	// Try to use the control's built-in FindForm method to get the parent form
	Control UIControl = (Control)control;
	ParentForm = UIControl.FindForm();

	// If FindForm didn't work, check if the control is being instantiated, 
	// which means the best bet is to get the last instantiated form
	if (ParentForm == null && !UIControl.Created)
	{
		CheckActiveForm = false;
	}
}

Let me know how this works for you!

Regards,