In IE:

1) Open a word .doc (Note with IE it open the word doc in-lined - that is in IE)
2) Hit the back button

Expected results: Directory listing with no warnings

Actual results: Directory listing but there's this warning in red:

warning: Missing argument 1 for _fileshare_download() in /var/www/drupal-5.1/sites/all/modules/fileshare/fileshare.module on line 718.

Thanks! -- Marcus