Do you have a blog? Do you require people leaving comments to enter in that jumble of letters before they can actually submit their comment? If so, then please consider the following: take it off. Please access your settings and undo this function. I used to have it on mine (I know, we all make mistakes), but have since realized what an unnecessary pain in the patootie this is.
I know you're worried about people leaving spam comments. But it won't happen. Trust me on this. And if it does, then go ahead and put the word jumble back on. But I really don't think you'll get any spam. I haven't had a single spam comment yet and I've been blogging for over a year. I kind of think the spammers would have found me by now if it was ever going to happen. Don't you?