OK. The error in editing your account should be fixed in r267.
I'm not sure what you mean by 'belove'. (some strange hybrid of 'above' and 'below') I'm using 5.3.5 myself.
I've disabled the block of code on the forums registration that was having the fatal error. (it was custom, and unnecessary anymore)
But, I'm not sure at all why you're not seeing the CAPTCHA image. (unless you're not seeing any images, and then that's a completely different problem) I've tried it on Firefox and Chrome under Windows and Firefox and Safari under MacOS and it shows up. I tried it through two different proxies, one doesn't transfer images at all, (so yeah) and the other worked.