I've used my Natasha pretty regularly (not every day, but at least a few days every month... with solid every day use for almost 6 months) for the past year or so, and I've never had anything EVER fall out!
I do have the problem with the strap starting to split. It's silly that they put the seam of the two leather parts of the strap at the middle, right where it sits on top of my shoulder. Because of this the plastic (?) holding the side seams together has cracked and now it's starting to split... good to know that I'm not the only one... but I do want to see about getting it fixed!
I've never had anything fall out, either!
Same thing happened with my strap, I sent it to MJ service and they must have melted and scraped away all the plastic sealing on the side of the strap (as it had cracked) and when I got it back it was thin and it's now peeled off and the leather underneath is exposed. Also, they didn't fix the split in the seam! I emailed them again and they will not send me a new strap. I'm kind of miffed about it and haven't used my Sasha because of the strap.