Thank you so much for your reply Bert.
On Friday I went back to my Fuji dealer to try and see what they had to say about it all. This time around they told me that they would try some of their contacts regarding the issue and try to ascertain what the problem actually is. I will, of course, try to keep you updated on anything I hear from them - although they warned me that it might take awhile.
I agree that the issue isn't actually that serious. However, for me the two main issues are, as you mentioned, switching between evf and ovf is near impossible and program buttons are almost always locked. Secondly, parallax correction in the ovf also suffers significantly. FYI mine also only jumps about when set to infinity.
Mine did get better for a few days as well, but now it's back to where it started. I hope your dealer is of use - please let me know (as I'm sure you will) if it turns out to be a lens issue