Installed Umbraco on a Windows 2003 server for the third time today. Got through the initial setup fine, deciding to skip the Starter Kit install, which is what has been giving me troubles. It errors out and does not completely install, for one reason or another.

So this time, I skipped the Start Kit, got to the back-office and tried to install the Simple kit there. Same problem. I changed the web.config customError to "Off" and tried again.  Here is the message it gave me:

[ArgumentException: An item with the same key has already been added.]
   System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) +52
   System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) +9382923
   umbraco.cms.businesslogic.packager.Installer.LoadConfig(String tempDir) +2724
   umbraco.presentation.developer.packages.Installer.startInstall(Object sender, EventArgs e) +45
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

Has anyone seen this before or had a similar issue? Thanks in advance.