I've started having issues with my F6, but it occurred to me after discussing with a few others that the issue might be caused by my bulk-loaded film. Here's the situation; My reloadable metal cassetes seem to cause my F6 to want to rewind mid roll, after creating a slight grinding noise. Film advance works perfectly (from what i've seen) with commercially loaded casettes, but I've seem to be noticing this problem increasingly with my bulk loaded film. My question is, Is this caused by a slightly bent casette creating some sort of tension and causing the camera to trigger rewind? Or is the film advance in my camera starting to die? The camera was in mint condition when I bought it, apart from a strange smell, but I have no way of telling how many rolls of film were run through it (or do I?). I suppose I could circumvent this problem by turning off automatic rewind in my camera and shooting over it, but the last thing i'd want to do is damage my film advance.