diff --git a/Library/Contributions/brew_bash_completion.sh b/Library/Contributions/brew_bash_completion.sh
index 0289204717..355d6443f8 100644
--- a/Library/Contributions/brew_bash_completion.sh
+++ b/Library/Contributions/brew_bash_completion.sh
@@ -63,11 +63,6 @@ _brew_to_completion()
     # handle subcommand options
     if [[  "$cur" == --* ]]; then
         case "${COMP_WORDS[1]}" in
-        audit)
-            local opts=$([[ "${COMP_WORDS[*]}" =~ "--strict" ]] || echo "--strict")
-            COMPREPLY=( $(compgen -W "$opts" -- ${cur}) )
-            return
-            ;;
         cleanup)
             local opts=$([[ "${COMP_WORDS[*]}" =~ "--force" ]] || echo "--force")
             COMPREPLY=( $(compgen -W "$opts" -- ${cur}) )
@@ -205,9 +200,16 @@ _brew_to_completion()
         esac
     fi
 
-    case "$prev" in
+    # find the index of the *first* non-switch word
+    # we can use this to allow completion for multiple formula arguments
+    local cmd_index=1
+    while [[ ${COMP_WORDS[cmd_index]} == -* ]]; do
+        cmd_index=$((++cmd_index))
+    done
+
+    case "${COMP_WORDS[cmd_index]}" in
     # Commands that take a formula
-    cat|deps|edit|fetch|home|homepage|info|install|log|missing|options|uses|versions)
+    audit|cat|deps|edit|fetch|home|homepage|info|install|log|missing|options|uses|versions)
         local ff=$(\ls $(brew --repository)/Library/Formula 2> /dev/null | sed "s/\.rb//g")
         local af=$(\ls $(brew --repository)/Library/Aliases 2> /dev/null | sed "s/\.rb//g")
         COMPREPLY=( $(compgen -W "${ff} ${af}" -- ${cur}) )
diff --git a/Library/Homebrew/download_strategy.rb b/Library/Homebrew/download_strategy.rb
index 58221c28f2..625dbaf9af 100644
--- a/Library/Homebrew/download_strategy.rb
+++ b/Library/Homebrew/download_strategy.rb
@@ -76,8 +76,8 @@ class CurlDownloadStrategy < AbstractDownloadStrategy
       # Use more than 4 characters to not clash with magicbytes
       magic_bytes = "____pkg"
     else
-      # get the first four bytes
-      File.open(@tarball_path) { |f| magic_bytes = f.read(4) }
+      # get the first six bytes
+      File.open(@tarball_path) { |f| magic_bytes = f.read(6) }
     end
 
     # magic numbers stolen from /usr/share/file/magic/
@@ -89,6 +89,10 @@ class CurlDownloadStrategy < AbstractDownloadStrategy
       # TODO check if it's really a tar archive
       safe_system '/usr/bin/tar', 'xf', @tarball_path
       chdir
+    when /^\xFD7zXZ\x00/ # xz compressed
+      raise "You must install XZutils: brew install xz" unless system "/usr/bin/which -s xz"
+      safe_system "xz -dc #{@tarball_path} | /usr/bin/tar xf -"
+      chdir
     when '____pkg'
       safe_system '/usr/sbin/pkgutil', '--expand', @tarball_path, File.basename(@url)
       chdir
diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index 65d34d4500..018547ff80 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -62,9 +62,9 @@ class Pathname
     return dst
   end
 
-  # extended to support the double extensions .tar.gz and .tar.bz2
+  # extended to support the double extensions .tar.gz, .tar.bz2, and .tar.xz
   def extname
-    /(\.tar\.(gz|bz2))$/.match to_s
+    /(\.tar\.(gz|bz2|xz))$/.match to_s
     return $1 if $1
     return File.extname(to_s)
   end
diff --git a/Library/Homebrew/global.rb b/Library/Homebrew/global.rb
index bded211430..fda41c5d32 100644
--- a/Library/Homebrew/global.rb
+++ b/Library/Homebrew/global.rb
@@ -56,7 +56,7 @@ module Homebrew extend self
   include FileUtils
 end
 
-FORMULA_META_FILES = %w[README README.md ChangeLog COPYING LICENSE LICENCE COPYRIGHT AUTHORS]
+FORMULA_META_FILES = %w[README README.md ChangeLog CHANGES COPYING LICENSE LICENCE COPYRIGHT AUTHORS]
 ISSUES_URL = "https://github.com/mxcl/homebrew/wiki/checklist-before-filing-a-new-issue"
 
 unless ARGV.include? "--no-compat" or ENV['HOMEBREW_NO_COMPAT']
diff --git a/Library/Homebrew/test/test_bucket.rb b/Library/Homebrew/test/test_bucket.rb
index 010c06761d..f328dacca1 100644
--- a/Library/Homebrew/test/test_bucket.rb
+++ b/Library/Homebrew/test/test_bucket.rb
@@ -32,8 +32,10 @@ class BeerTasting < Test::Unit::TestCase
     assert_nothing_raised do
       MockFormula.new 'test-0.1.tar.gz'
       MockFormula.new 'test-0.1.tar.bz2'
+      MockFormula.new 'test-0.1.tar.xz'
       MockFormula.new 'test-0.1.tgz'
       MockFormula.new 'test-0.1.bgz'
+      MockFormula.new 'test-0.1.txz'
       MockFormula.new 'test-0.1.zip'
     end
   end