I'm looking to see if I could get pointers in where to look to solve this issue.
In Chrome, viewing the blog http://www.bitesizeirishgaelic.com/blog/ in Chrome v21, the page downloads as a file "download", rather than opening normally.
The rest of the site on the same server loads fine in Chrome.
All pages load fine in Firefox.
I suspected that it was something to do with the APC caching for Apache, and/or WP Super Cache. However, after disabling both, and clearing my browser cache, the problem continues.