Script sometimes not recognized as php

I have several LAMP sites on my machine. Occasionally when accessing a page the browser says the document is of unknown type and wants to know what to do with it. I click on 'Cancel' and try the page again and this time it works as it should. Why would apache *sometimes* fail to interpret a php script as php? -- The difficulties which I meet with in order to realize my existence are precisely what awaken and mobilize my activities, my capacities. Rick Pasotto rick@niof.net http://www.niof.net