pressflow/6 — pull request #12 by generalredneck (2012-02-02 19:36:44+00:00)
Title: DO-952220: This is a patch for DO Issue 952220

This patch fixes the problem where IE8 downloads JSON responses under unknown conditions from AHAH forms. Please see http://drupal.org/node/952220 for more information.

Also if you wish pursue the true cause of this issue, feel free to message me. I've run out of ideas or ways to narrow down what it could be.