I upgraded my Angular 2 Plunker from RC.4 to RC.5 by doing the following:
I don't see any other changes that are required for my simply plunker.
I keep getting this error: Error: TypeError: core_1.NgModule is not a function(…)
I hit the exact same problem on my project. It worked on 1 pc, didn't work on another. Turns out the solution was simple:
Clear your browser cache