Cleaning Maven m2e .cache directory

My Maven installation (Windows 7 64-bit) has a .cache directory that is almost 3.5GB! It contains only a m2e directory. (I’m running Eclipse 4.3M7 with m2e.) Surely all the things inside aren’t needed …

Eclipse project hiding src folder

For some reason Eclipse has started hiding the ‘src’ folder in some but not all of my projects and I would like to get it back.

The files under src are still available under other generated views …