I have sharepoint foundation 2010, presence works in outlook, and WILL work when i open a fresh browser and go to my sharpoint server. Presence shows, if i reload that same page presence stops working. If i close the browser and re-open it go to my sharepoint again presence works... if i click any navigation link to annother page, presence breaks... if i go back to the page that worked, still broken. Once i close the browser tab and go back to sharepoint for the first time again works! any idea whats going on?