.NET 3.0 problems

> I am seeing a problem with Vista Beta 2 where some .NET websites yield the
> error below. This is the same error you see when you don't have .NET 2.0
> library installed on XP SP2 or if you run another browser that doesn't
> support .NET at all. I ran the utility that changes registry settings to
> allow IE 7 to spoof IE 6 and this did not help. I understand that .NET 3.0
> library is automatically installed with Vista. Is there something I have to
> do to enable it or is this a bug in IE 7 or an incompatibility with the .NET
> 2.0 framework?
>
> Thank you in advance!
>
> Server Error in '/' Application.
> --------------------------------------------------------------------------------
>
> Index was outside the bounds of the array.
> Description: An unhandled exception occurred during the execution of the
> current web request. Please review the stack trace for more information about
> the error and where it originated in the code.
>
> Exception Details: System.IndexOutOfRangeException: Index was outside the
> bounds of the array.
>
> Source Error:
>
> An unhandled exception was generated during the execution of the current web
> request. Information regarding the origin and location of the exception can
> be identified using the exception stack trace below.
>
> Stack Trace:
>
>
> [IndexOutOfRangeException: Index was outside the bounds of the array.]
> Webgalen.NPhysicianPeerReview.Page_Load(Object sender, EventArgs e)
> System.Web.UI.Control.OnLoad(EventArgs e) +67
> System.Web.UI.Control.LoadRecursive() +35
> System.Web.UI.Page.ProcessRequestMain() +750
>
>
>
>
> --------------------------------------------------------------------------------
> Version Information: Microsoft .NET Framework Version:1.1.4322.2300; ASP.NET
> Version:1.1.4322.2300