I'm getting really fed up with the automatic grammar checker which is part of Microsoft Word. I know I could turn it off but it does spot all those those repeated words that I'm so fond of. It is always telling me to replace "which" with "that".

It's driving me mad! Is it really so bad to say "which" in a sentence? Is it a local variation or some kind of Bill Gates house rule? Do us Brits say which more often than US English speakers or am I on my own here?

I think I may need some advice from Mr Bingley. Any thoughts?