Imagemagick issue on Lion installed with Homebrew

Question

I am trying to use the Paperclip gem on a Rails project so followed the docs and first installed Imagemagick using the Homebrew recipe.

I added to my model my attach

Answer 1

After a software update on OSX MoutainLion ImageMagick stopped working for me too, but simply following the steps taken by Chris worked:

brew update
brew remove imagemagick
brew install imagemagick