I've made some changes last week on some of my Appex classes and this morning with the same configuration and when I try to save my changes on the server I get this error message:

File only saved locally, not to server

So I've created a new project, a new workfolder and  made a checkout of everything and without even changing the code, I still get this error. I have some Appex pages too, but they work fine (compile ans save on server).

I notice on ''Monitor Deployment'' that the deployment status is supposedly completed and all my classes have the API version 15 but when I create new classes I can only select API version 16 now. Is this related to my problem?

Does some of you knows a good way to fix this?