Only once, and that was in the first week of using the headblade. No problems since then. Although occasionally I find one blade does not seem to be as sharp as most. Guess that's manufacturing variation.
Agree with you there Mr Zed. I do like the headblade. But I'm not sure if I'm than keen on their triple razors.
Been using Mach 3 with the HB. You have to be more careful, but you get better results. And in my case, practical no razor irritation.