Issue with code autocompletion / syntax highlighting in Xcode 4.x

Question

I am having a rather strange issue in Xcode on one of my projects.

When I start to write my code, I am used to the auto-completion suggesting numerous entries for me

Answer 1

Deleting only the Derived Data of the project that is failing is not enough

I had to delete all Derived Data of all projects, did a Clean project and restart Xcode

Amazing