Are you getting the infamous overheating warning appear on screen? If so it's a problem with the firmware, which can be updated via Fujifilm's website.
I had this problem when I first used my camera back at the start of June - the warning would appear after about 15-20 mins use on an averagely warm day. I updated the firmware & (2,000+ photos on) the warning has not appeared again.
Not at all happy with this camera or Fuji. The camera freezes and the only way to get it to work properly again is to drop the batteries out and start again but can only use it for a few shots before it does it again. I have e-mailed Fuji but they have not replied except to say they have received the e-mail and gave me a contact reference. I have e-mailed them again but it seems they don't want to know. Maybe it has something to with the fact the camera is nearing the end of its warranty and they are playing for time. Would not recommend it at all - or Fuji for that matter.
If u r in the UK then it does not legally speaking matter if the warranty does run out on your camera cause consumer law states that a product is supposed to be fit for purpose depending on how u paid for it, so for example if u had bought what many people would consider to be a cheap make of camera then u would only expect 12 months warranty but on a Fujifilm camera as it is considered a good make then u can go over the 12 months and still get at least a free repair. Also if u bought you camera with a credit card that gives u ever stronger rights. Hope that helps.