A floating point regression in 7.0.3 affecting x86 has been fixed. The GHCi linker now handles partially stripped object files. This fixes loading the ghc package in ghci when it's been stripped, which is often the case in Linux distribution packages. A bug that caused bad results from getCPUTime, getClockTime, and getCurrentTime has been fixed. Several runtime system bugs were fixed. Incorrect directory permissions when installing have been fixed. Some improvements have been made to the new Cabal testsuite support.
