Two different Symbols for the "same" project

Question

I just saw that at a checkout with cvs, the projects have 2 different symbols. Strangely, most of the projects are the same. A few, however, are only to be found under a Project-symbol. Does anyone know what these symbols means?

Answer 1

Not from the top of my head but you can probably figure this out by looking inside of the .project file. Usually, such overlays are added by project natures.

Compare the natures of the two projects, that should give you an idea.