I have a work around I send files from my n900 to PC. effectively the problem is the n900 didn't identify your computer with "OPP" blue tooth profile. So what you have to do is delete the Blue tooth PC device from your n900. Then select an image and send it via blue tooth. make sure your PC blue tooth profile is on and ready to receive a file. the n900 will find your PC and you can send it. Now the n900 will identify your PC with the OPP profile so you can blue tooth files back back and forward. but you will loose other profiles like A2DP etc. but you will be able to send files.