I was trying to use XCode 3 to compile an old project and kept getting an error when precompiling. Looked like something did not install correctly so I tried to reinstall only to get failure ‘nothing to install’ when trying the Developer.mpkg file.
I then tried installing each package individually when I ran across DeveloperTools.pkg which reported a preinstall script error. Tried copying the file over to my desktop, same error. Tried installing from root login, same problem.
Then, I selected a different destination folder /Temp and in finally installed. I copied over /Temp to /Developer and now can compile the old project.
Moral of the story, try everything! Must have been a permissions problem or something. Anyway, so far so good. Back to programming 