I don't know what caused Visual Studio to start thinking it needs to publish my project, but now whenever I build it, I get several "Unable to apply publish properties for item 'blah'" warnings. How do I stop Visual Studio 2005's publishing facilities from working on my project completely? I use InstallShield, so I don't have any use for Visual Studio's publishing system.
Open your project, select Project Properties->Publish(ing)->Application Files and click the reset all button. Does that help?