aweber/AWeber-API-Ruby-Library — pull request #4 by ashb (2011-12-06 09:10:10+00:00)
Title: Require json, not json/pure

Loading json/pure.rb directly causes it to issue redefined warnings under a Rails app.

json.rb (as found in json_pure) will first try to load json/ext and if that fails falls back to json/pure, so this is better all round (faster, works.)