Yeah, I do see now that there is an image verification for search if you are not logged in. I am not sure what the point of this is. If someone is going to take the time to make a script to search the forums enough to bog down the servers, they are obviously going to take the time to create an account so they don't need to deal with the image verification. It only serves to make it harder for people who aren't registered to search.
Anyway, here is a screen shot of the image verification.