I have a set of Deore cranks that came on my 1987 Stumpy. They are square taper and have a little less than 25,000 miles on them. They have been on 6 bikes since I've had them. No cracks no signs of problems. The only problems I've ever had with square taper were loose bearing BB's. There may be issues with square taper cranks but I haven't once seen it on any of my bikes. I will always use square taper as long as I can get them.