IE problems with encoding and displaying pages

I am developing a webpage for work and having 2 problems, both happening only it seems with Internet Explorer (we are currently running version 6 in the office)

It doesn’t do it in IE 7 beta, nor in Firefox, or Opera.

[B]First problem[/B]
When we enter the address [url]www.centrestart.co.uk[/url] I get a pop up, as if IE is trying to download a file instead of opening the page

[URL=http://www.centrestart.co.uk/error.gif]Link to screen grab of error we are getting[/URL]

[B]Second Problem[/B]
Despite having a line in the header telling it what charset the page is in, it still seems to have a problem with the encoding and displays garble when some links are clicked on. If you click the back button and then the forward button the page then displays correctly.

Not having either of these problems on other browsers, or on my machine at home (in IE 6)

These are driving me crazy. Can anyone help?

Also in #HTML _↴