Can't see anything obvious which would have caused it, but todays rawhide is missing the "general" section in .treeinfo: http://kojipkgs.fedoraproject.org/mash/rawhide-20080910/development/i386/os/.treeinfo it was there yesterday: http://kojipkgs.fedoraproject.org/mash/rawhide-20080909/development/i386/os/.treeinfo
I believe this is caused by an error in maketreeinfo.py caused by converting from the print statement to print function. This should be fixed in the next build of anaconda, which will likely be today.