Problem/Motivation

Using Windows Server 2008 R2 and either Microsoft's URL Rewrite module or Ionics Isapi Rewrite Filter (http://iirf.codeplex.com/), Node Relationships autocomplete widgets fail with an error 404 when a string containing a space is supplied to the text field. Everything works fine without Clean URLs on. Using CCK version 6.x-2.9. More detail: http://drupal.stackexchange.com/questions/5761/autocomplete-fields-throw... and http://serverfault.com/questions/288064/rewriting-iis7-urls-to-properly-...

Proposed resolution

Properly urlencode autocomplete values before they are supplied to AHAH. (Best guess; very unfamiliar with autocomplete.js.)

Turning on Clean URLs is the last thing I need to accomplish before finishing this project. Gratitude and epic winning for any help you can give me.