kissmetrics/KISSmetrics — pull request #5 by erictj (2011-10-30 03:53:20+00:00)
Title: PHP module munges up the RFC encoding so spaces for properties are + signs.

PHP 5.4.0 has built-in support for denoting what RFC encoding you want when creating a query string. Since that's not available to everyone, this includes a one-line addition so that property names come through clean, w/o any lame + signs in there for spaces.