I already talked a bit about it over at my twitter, but I want to elaborate a bit because it's something a lot of people don't seem to understand.
I've developed a fear of cats. It's not a phobia because I can function perfectly normally in a room with a cat. It's presence doesn't bother me one bit. I'll even pet it, but I don't particularly enjoy touching it and if it tries to stand on my lap we're going to have a problem.
The thing is, it's the cat's claws I don't like. Even if a cat enjoys what you're doing to it, it'll bore it's claws into you out of pure bliss. Holding a cat usually involves pain too unless you face it away from you. I'm aware that not every moment with a cat is filled with pain, I've owned cats and lives with one at the moment after all (though it's not mine) and we get along just fine, but I've got more scars from cats than anything else (including the one I live with) and none of those cats were angry with me. They were just doing cat stuff.
Cats' unpredictability scares me. I'm not blind to cat language. I know what the different tail movements and facial expressions mean, but sometimes they just randomly attack. Heck, if you pet them the wrong way you get your hand bitten/clawed the shit out of without warning. That's probably the main reason why I'm afraid of cats.
I've been bitten by dogs, but I always know why because dogs always give warning (I've had friends who didn't understand dog language so they understandably felt dogs were unpredictable, but if you know dogs you always see an attack coming a mile away) and all my dog injuries were because I knew a dog was aggressive but took hold of it anyway to get control of it, yet no dog has ever broken my skin.
Of course there are dogs that haven't been treated well and are straight up psychotic, but even that you can tell and know to stay the fuck away from.
So yeah, it's not a case of "I met this one crazy cat and now I'm afraid of all cats" It's a fear that has developed steadily over time because of cats' nature. I don't hate cats. I don't want to hurt them because they're just doing their cat thing and lots of people love them for it, but I don't feel comfortable touching them.
As long as they don't expect me to pet them, cats and I are cool.