uh oh.

gistfile1.txt

$ brew install jpeg cairo librsvg
Formula already installed: /usr/local/Cellar/jpeg/8c
==> Downloading http://downloads.sourceforge.net/project/libpng/libpng12/1.2.44/
######################################################################## 100.0%
==> ./configure --disable-dependency-tracking --prefix=/usr/local/Cellar/libpng/
==> make install
==> Caveats
This formula is keg-only, so it is not symlinked into Homebrew's prefix.
Mac OS X already provides this program and installing another version in
parallel can cause all kinds of trouble.

Generally there are no consequences of this for you, however if you build
your own software and it requires this formula, you may want to run this
command to link it into the Homebrew prefix:
    $ brew link libpng
==> Summary
/usr/local/Cellar/libpng/1.2.44: 12 files, 1012K, built in 18 seconds
==> Downloading http://www.cairographics.org/releases/pixman-0.21.2.tar.gz

curl: (22) The requested URL returned error: 404
Error: Failure while executing: /usr/bin/curl -f#LA 'Homebrew 0.7.1 (Ruby 1.8.7-174; Mac OS X 10.6.7)' http://www.cairographics.org/releases/pixman-0.21.2.tar.gz -o /Users/cbq/Library/Caches/Homebrew/pixman-0.21.2.tar.gz
~  $