Seeing the following ClickOnce error log? Well your ClickOnce manifests are not signed ...
System.Deployment.Application.InvalidDeploymentException (ManifestParse) - Exception reading manifest from http://foo.application: the manifest could be invalid or the file could not be opened. ... --- Inner Exception --- System.Deployment.Application.ValidationFailedException (Unknown subtype) - The manifest has no XML signature.
But I did sign the manifest while publishing in VS?
Check if your project includes assemblies with spaces in their name. There is a known Beta2 bug which causes VS to barf on signing manifest if the project includes Assemblies with spaces in the name.Renaming the Assemblies in the easy workaround.