Perforce has updated its client

I wasn't able to upgrade my p4 client until I fixed the checksums:

    $ brew upgrade perforce
    ==> Upgrading 1 outdated package, with result:
    perforce 2013.1.610569-x86_64
    ==> Upgrading perforce
    ==> Downloading http://filehost.perforce.com/perforce/r13.1/bin.darwin90x86_64/p4
    ######################################################################## 100.0%
    Error: SHA1 mismatch
    Expected: 8a8b349dc698699b125185e285303a4c855c4cd2
    Actual: 4bba9ba354a82d62b6569d1df41b49fc5731cb52
    Archive: /Library/Caches/Homebrew/perforce-2013.1.610569-x86_64
    (To retry an incomplete download, remove the file above.)