Xcode 3.2.1 is an update release of the developer tools for Mac OS X. This release provides bug fixes in gdb, Interface Builder, Instruments, llvm-gcc and Clang optimizer, Shark, and Xcode and must be installed on Mac OS X 10.6.0 Snow Leopard and higher. See the accompanying release notes for detailed instructions, known issues, and security advisories.
Received this last night in Software Update. Update is 263.3 MB in size.