Exception in SubscriptionList webcontrol

Description

Steps to reproduce

1. Add the property EPSUBSCRIBE of any type on, for example, a Standard Page.
2. Assign to the property any value under the start page and publish changes.
3. Create an .aspx page.
4. Add <EPiServer:SubscriptionList runat="server" ID="myList" />.
5. In the codebehind, add this in OnLoad().

   myList.PageLinkProperty = null;

   myList.PageLink = PageReference.StartPage;

   myList.DataBind();

6. Add a new property to the web.config under profile/properties.

<add name="SubscriptionInfo" type="EPiServer.Personalization.SubscriptionInfo, EPiServer"/>

Surfing this page gives an error:

Server Error in '/' Application.

Unable to cast object of type 'EPiServer.Core.ContentReference' to type 'EPiServer.Core.PageReference'.

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.

[InvalidCastException: Unable to cast object of type 'EPiServer.Core.ContentReference' to type 'EPiServer.Core.PageReference'.]
EPiServer.DataAbstraction.SubscriptionService.GetSubscriptionPages(PageReference root) +254
EPiServer.Web.WebControls.SubscriptionList.PopulatePages(PageDataCollection pages) +177
EPiServer.Web.WebControls.PageControlBase.GetPages() +61
EPiServer.Web.WebControls.SubscriptionList.CreateChildControls() +73