Page rendering errors in Visual Studio

I have downloaded the 1.50 version with source code. Installed on the <local> IIS7.

When I open the solution in VS2010, I recieve several of the following errors.
      Error Rendering Control _controlname
      An unhandled execption has occored.
      Label ID property is not specified.

If I Run the project within VS it runs fine. It ran the install database and then runs the site correctly and looks good.
The pages, as rendered in VS, look like a single colume of controls with no specific layout and the above errors for some controls.

I have used both VS 2008 and VS 2010 with the exact same results.
I have installed the source code into different folders for each VS version.
Installed the lasted Ajax toolkit.
VS 2010 professional is the release version from this month.
Windows 7 client with a fresh install of IIS7 using the Web Platform Installer.

Thanks
Fran

If you Build the project in VS does it show errors? (or only warnings?)
If you don't see any errors when building, but you do see errors in design time then it's ok, don't mind it, it can happen sometimes in VS (you can't fix it)

Thanks.

No errors on buld and it runs perfect.  Just the design view is borked.

I guess WYSIWYG is supposed to be a big advantage to using VS.  So a little(lot) of disappointment there.

Don't worry about it too much. Is sometimes happens in VS when there are a lot of nested usercontrols.