I've just noticed that the permalink structure on my site has changed, I've tried the usual stuff (flushing permalinks etc) but to no avail.
The original structure was
mysite.co.uk/blog/some-title
but it's now become
mysite.co.uk/some-title
In a nutshell the 'blog' part of the url has completely disappeared.
I haven't made any changes to the permalink settings, or any of the theme files - does any one have any ideas?