Erm.. I have the same problem. I just downloaded the latest, and the recommended build, tried both, but when i opened eclips, common folder does not exist. I downloaded and unziped it on my desktop, opened it and clicked install. It downloaded everything successfully with no errors, but when i start eclips, common folder icon is there on the project explorer, but when you right-click / properties, it says <resource does not exist>. Tried both latest and recomended. Also tried to replace mcp/eclipse with fml/eclipse. Does not work. Did i do something wrong?