Stitches have slipped off of my Addi Turbos but nothing serious. Nobody told me I couldn't do it so I didn't have any problems for the most part. I've lost more stitches using bamboo and the Knit Picks Harmony straights anyway. I was holding up my work, admiring it, and oops! turned the needle the wrong way ... ziiiiiiiiiip goes the whole thing!
ha ha I crocheted before I picked up the needles so yes, I can see that having done handwork before might make a difference.