This error has already been reported, please check your Host Settings and versions tables, there might be a miussing/interfering entry.

And another 'little' problem. So, I deleted all the files in the root directory of the site and copied back the original files from the 4.x version. I then restored the data base. Every thing seemed fine, until I tried to upload a new skin and got the following error. It apprears to be a premissions problem, so maybe the permissions didn't set properly from the copy paste operation? So, I guess what I am asking is how can I correct the permissions on the files to allow the Host account to again be able to write to them? Here is the error:

Error: Install Skin Package is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: Access to the path 'C:\inetpub\wwwroot\iis\dotnetnuke\wwwroot\Portals\_default\Skins\QuadratBlue\images' is denied. ---> System.UnauthorizedAccessException: Access to the path 'C:\inetpub\wwwroot\iis\dotnetnuke\wwwroot\Portals\_default\Skins\QuadratBlue\images' is denied. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, DirectorySecurity dirSecurity) at System.IO.Directory.CreateDirectory(String path, DirectorySecurity directorySecurity) at DotNetNuke.UI.Skins.SkinController.UploadSkin(String RootPath, String SkinRoot, String SkinName, Stream objInputStream) at DotNetNuke.Modules.Admin.FileSystem.WebUpload.cmdAdd_Click(Object sender, EventArgs e) --- End of inner exception stack trace ---

This is extremely frustrating. Again, any insight is greatly appreciated.