Problem with captcha the image doesn't appear anyone have the same problem?

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I am currently joining in some warez forums trying to increase my traffic from my logs but apparently I could not complete the registration due the image verification is not appearing. I have this same problem when I'm trying to download files and there is this captcha verification. The captcha box was there but there is no image to copy for verification. I was thinking if my browser or my system have a problem, but when I tried to register to nuffnang the image verification is there but it is different from the other captcha verification that we used to see. Is there someone else having the same problem as mine?