If anyone else ever sees this I know it looks a bit strange, but I installed Konqueror as I like it for web browsing sometimes. Then whenever I mounted an external drive Konqueror would pop up instead of Nautilus. I happen to prefer Nautilus as a file browser.
Anyway, put up with it for ages and then found a ridiculously easy fix!. Just Open Konquerer, browse to any folder, right click and go 'open with' then select Nautilus.
