Page has been forced to php

One of my pages (a regular page) always used to be html is now a php page. Why would Sparkle force this to happen - or would this be my hosting provider?
This is the page and it has a flashing glitch that has also appeared!

OK, so its sod’s law. Uploaded the site again and all seems to have reverted to being OK!

I on my hand get a 40 Error with watching your site.

Please try to delete your browser cache as it seems to be working on all my browsers now!

Anyone else seeing a problem - its just the one page that had this issue!