Relevant components: Windows 7, Firefox 12, IE 9, SBS2003 R2
When accessing Outlook Web Access (OWA) I can see public folders in Firefox12 but not in IE9. In IE 9 public folders are not displayed in folder list. When you click Public Folders on the option at the bottom left of the display a blank new window opens.
I have a couple of days to sort this as I have six users accessing outlook via OWA (just taken up new position and been landed with this problem)
Firefox is not an option as users don't want to change from IE (why should they, no other problems).
Found that I could see folders in Firefox when using OWA from my home.