Is anyone using ClickOnce with VS2010?

I’m getting the following on publish, when the solution builds fine ...

Building WindowsFormsApplication1...
Error: Cannot publish because a project failed to build.

Have tried everything, new clean project (both windforms and WPF), new temporary key, disabled pre-requisites and played with every publish setting. I was hoping it’d be fixed in final, the same thing happened in RC

My 'workaround' at the moment is to use msbuild.exe with a clickonce.proj, along the lines of the following http://social.msdn.microsoft.com/Forums/en-US/msbuild/thread/40bb7d32-a9ad-40d7-8113-cb3ed2747e69 (wired to an external tool+toolbar button as in hanselman's parallel build blog post)

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