I've also never been nicked with the fusion, except for going too fast and catching the top of my ear. Bloody mess.
I with you on that. Ears bleed like crazy. I nicked my ear last month and it bled for a long time.
Quick story - when I was a kid, my barber cut the top of my ear really bad. I was playing football then and had practice that afternoon. Halfway through practice, the coach came running over to ask if I was okay. It turns out, that ear just wouldn't stop bleeding and blood had been running out of my helmet and all over my jersey. I was covered in blood. The cut was so deep that it took about a week, before it finally closed up and stopped bleeding.
I've tried to be careful around my ears, ever since that.
Oh boy, nicking the top of the ear always sucks. I actually had a pretty gruesome shave earlier, I nicked myself a couple of times as well. It was my own fault though, I didn't have enough growth to shave again. I plan on trying out the Quattro soon, I hear good things.
Like Timmj said, make sure to keep pressure off of the blades. You may also want to try a different blade on the HeadBlade.
hey raul: sorry 2 hear 'bout that. hope the next shave is a better one. whatever, U do..."don't" give up. there's nothing better than wearing a freshly scraped noggin'.

WARHAWK
Without sounding contentious...
Some people do better with a Mach3, compared to a Headblade. Don't be afraid to try different razors out.
I've never tried the headblade but I am really pleased with the shave I get from my mach 3