Hi folks. This is just my second post aside from my introduction, so thanks in advance for your insight! I've got a question regarding a couple small cracks that I just discovered in an older steel road frame of mine. Let me start by saying that I'm not doing any kind of serious training or racing or high performance riding or anything like that. I'm headed back to school full-time and in the process ditching the car in favor of biking and hopping on the train to do my commuting. My overall plan is to just rely on the car less and less and a bicycle more and more in life. I'm having a lot of fun getting back into biking after not even owning a bike for about 6 or 7 years. So back to this bike at hand... it's a 70's road frame and by no means a high end model -- a Motobecane Nomade Sprint. I realize that the steel used and the frame aren't to die for/top of the line, but it's a bigger bike (64cm) as I'm 6'7" (weigh about 210-215 pounds) and fits me pretty well and feels good riding. I haven't ridden it too much yet but the little that I did it was good. Plus it seems to be a great take-on-the-train-and-up-to-school-type low profile bike. The frame has got your normal nicks and scratches here and there and some slight rust in a few spots but really not too shabby. Pretty clean all around (for the most part) and in pretty good shape. Except... the thing is, I discovered some small cracks in the frame and I'm trying to determine whether the cracks make the bike "unsafe" and I should just ditch this frame and get something else, or if it's not that big of a deal and I'd be fine just riding as is for how I'm going to be using it. Specifically, the cracks are located where the seat stays meet the seat tube. See the pictures below. I noticed almost a peeling effect on the top of where these meet. I'm sure I could pull this back and break it off. And then the crack continues down and makes a slight curve toward the underside of the seat stay. It's doing this on both sides, but it's the right side where the crack is bigger/longer. In three of the pictures, the camera is just below the top tube and I'm looking back at the seat stay/seat tube juncture. In the other two pictures, I'm obviously looking down on the frame with the seatpost removed. Based on the pictures and my description, what do you guys think about the safety and structural stability of the bike in this shape? Should I continue riding it if everything else is fine, or just ditch it and pick up something else? If you want to see more pics, just drop me a line. Again, thanks in advance for your insight/opinions!