strange new problem with IE

Hi,

For about the past week or so (after getting a new IE update) I've been
having strange problems with IE and my PHP scripts. One out of ten times
or so, when you click on a link or open a page, IE pops up a file
download dialogue instead of displaying the page. It's asking you to
open or save the page you are trying to visit. This is on a site that's
been working fine for about 6 months. It seems to happen on any type of
page, whether it's just grabbing DB content for display, or has a form
and is updating a database.

Anyone else seeing this? Any thing I can do?

Sam