<p>So I recently purchased a rb67 kit and joined Photo.net not too long ago (SUP EVERYONE)! I noticed that sometimes I will cock my shutter and then the lever will lock but I will not be able to fully push the shutter button ( I cant take a picture ). I seen that a lot of people have had this problem and some even went as far as to dissemble their camera and send it to repair shops etc. Fortunately for me I was able to "Solve" the problem by just trying a bunch of different things...<br /><br />So For some reason I cannot release the shutter if my Pro SD back is not switched onto multiple exposure mode. To take my photo I have to turn multiple exposure on, advance film cock shutter, take picture and then repeat. If someone could elaborate on this that would be great , because I don't think I had this problem on my first roll. <br /><br />I was also able to release a locked shutter lever by taking off the back and then pressing the shutter button. </p> <p>Some insight from a pro would be great...</p>