Argument cannot be null. Parameter name: uriString
Exception Details: System.ArgumentNullException: Argument cannot be null. Parameter name: uriString

Stack Trace:

   at System.Uri.Parse (UriKind kind, System.String uriString) [0x00802] in /home/toshok/src/mono/mcs/class/System/System/Uri.cs:1483 
   at System.Uri.ParseUri (UriKind kind) [0x00000] in /home/toshok/src/mono/mcs/class/System/System/Uri.cs:1133 
   at System.Uri..ctor (System.String uriString, Boolean dontEscape) [0x00064] in /home/toshok/src/mono/mcs/class/System/System/Uri.cs:161 
   at System.Uri..ctor (System.String uriString) [0x00000] in /home/toshok/src/mono/mcs/class/System/System/Uri.cs:114 
   at System.Windows.Browser.HtmlPage.get_DocumentUri () [0x00000] in /home/toshok/src/mono/olive/class/System.Silverlight/System.Windows.Browser/HtmlPage.cs:92 
   at SilverlightSurface.Page.BrowserHost_Resize (System.Object sender, System.EventArgs e) [0x00000] 
   at System.Windows.Interop.BrowserHost.InvokeResize () [0x0001b] in /home/toshok/src/mono/olive/class/agclr/System.Windows.Interop/BrowserHost.cs:82 
   at Mono.Events.surface_resized_callback (IntPtr target, IntPtr calldata, IntPtr clozure) [0x00000] in /home/toshok/src/mono/olive/class/agclr/Mono/Events.cs:212