1Password and MacWorld Forum Login

Hi All. I did a quick scan but didn't find any info on the issue I'm experiencing. I use 1Password to log into all of the web sites and forums in which I participate. I set up the MacWorld Forum log in the same way as any other, entered my login name and had 1Password generate a new password. I received the change confirmation e-mail and tried logging back in using 1Password's autofill. For some strange reason it doesn't work. If I copy and paste the password that was generated it works fine. Has anyone else run into that? MacWorld gave 1Password 4.5 Mice...you'd think it would work with their own forum. TIA.