I'm upgrading to 5.3.0 and ran into this problem posted in the release notes:

"Due to potential namespace ambiguities between System.Web, DotNetNuke.Web and Telerik.Web namespaces in DotNetNuke 5.3.0 you may encounter the following error during upgrade: “Type 'Web.HttpResponse' is not defined.” This error primarily occurs if an the XML module is already installed. It is recommended that you uninstall the XML module if it is not in use. We anticipate releasing a patched version of the XML module this week to address this issue."

Now that I'm getting the error, how do I uninstall the XML module?

I was able to fix the problem in this way: Find the download.vb file in the App_Code\XML\Handlers directory Edit line 34 from: Private Sub RenderToResponseStream(ByVal Response As Web.HttpResponse, ByVal controller As XmlController) TO: Private Sub RenderToResponseStream(ByVal Response As System.Web.HttpResponse, ByVal controller As XmlController) NOTE: You simply need to fully qualify the Web.HttpResponse as a System.Web.HttpRespone You will also need to edit line 89 from: Private Sub handleAuthenticateRequest(ByVal context As Web.HttpContext) To: Private Sub handleAuthenticateRequest(ByVal context As System.Web.HttpContext)

Prima!

Big Thanks, Kenneth !