Unrecognized attribute 'multipleSiteBindingsEnabled' issue on different Windows
The problem is Application Pools. If the target .net framework is 4.0 on your Visual studio then convert the .net framework version from 2.0 to 4.0 in App pool. because when you host an application, by default it is set to version 2 in the pool. By clicking on the application pool which is for the app you can change the version to 4.0.
Since the attribute is only applicable to applications that target the .NET Framework 4.0, I would suggest removing it all together from your configuration. Even if you could find some notes buried in the documented SP1 release, it still does not help you any if you are targeting an older Framework like 3.5.
MSDN link describing 'multipleSiteBindingsEnabled' attribute and its support:http://msdn.microsoft.com/en-us/library/system.servicemodel.servicehostingenvironment.multiplesitebindingsenabled.aspx