[__david__]

I think it's so annoying because of the timing. I've never had one break when untying the knot or when just walking around. It's always while tying it which means I was just about to leave and now life has thrown a monkey wrench into my plans. Depending on how close I am cutting things, this may be an event that makes me late. Grrrrrr. Stupid shoelace!

[pkolaczk]

Yes, this! And this happens particularly often, when you use standard cotton laces which make knots harder to accidentally undo. The synthetic ones last much longer, but are slippery and easy to untie.