Odd lettering and font

[leighextence]

Since upgrading to Premium 365 I have had very odd symbols appear instead of, and around, some of my lettering. At first I thought I’d done something wrong whilst editing, but then I went and started a ‘test’ site using a fresh Xara template and spare hosting site.

The problem is as follows:
Starting completely from scratch I opened a template, Prestige Estates, and did nothing but add some text on the index page, as follows:
This is the original site that I used so let’s see if there is any problems with fonts if I go straight in with typing; i.e. what about the £ sign for instance? Or if I put half-an-inch as 1/2 inch?

I then saved and exported the site to a folder on my desktop, and published it to the spare hosting site I have; www.ashtonsfineart.co.uk. Low and behold, when I opened it in Explorer, and Firefox and Chrome, it looked like this:
This is the ‘original’ site that I used, so let’s see if there is any problems with fonts if I go straight in with typing; i.e. what about the £ sign for instance? Or if I put half-an-inch as ½ inch…

So it wasn’t my just my original website that had gone odd, but a fresh, unadulterated one that came straight from the Xara templates. Something strange is happening. Desperate to know what can have happened here as my website is my worldwide ‘shop front’ and these anomalies make it look shabby. Any assistance gratefully received!

As an afterthought... when I review the 'test' page above whilst in Xara Webdesign it appears as normal.