I think it may be a server problem. I always post from my iPad and worked great until I tried posting a pic last night. It was no go. I've tried several times since with no luck.
I got a response in the "Site Information" thread that they made some changes yesterday and just missed a step on the restart. If you were posting pics before it should work again now. If you're just having trouble starting, shoot me a PM and I'll talk you through it over the phone.
Attempting to post from my iPhone photo library using copy and paste. Get this error message : Image verification unsuccessful due to incorrect reCAPTCHA parameters. Contact the admin.