OMG! I got this when I had an MC Speedy. It made me so upset because it was my Holy Grail Bag and I hated that it put those marks on my arm. I sold it the following year but I can't believe others had this same problem.
cant say that has ever happened to me that's weird though!
oh boy! that doesnt make me happy =(I find it too heavy for non-handheld use as well. I don't think your arm can get used to that kind of weight if it's as sensitive as you say it is. I won't even carry my Damier Speedy 25 that way as it has pinched my skin also.
A friend of mine who is studying to be a chiropractor said that she's seen alot of damage done b/c of holding heavy bags in the crook of your arm. She wasn't talking about superficial bruising either but nerve damage.