i\'m trying to track a NullReferenceException that shows up on sitecore 6.5 at loading any webpage:
[NullReferenceException: Object reference not set to an i
I had the exact same problem (my stack trace was the same as the one posted) and it turned out to be a malformed .config file in the App_Config\Include folder. Fixed the config and my site loaded without problems.
.config
App_Config\Include