Sorry for little OT, but it was quite difficult to register here. ;-) There should be warning that security code is case sensitive because it's not always obvious. After some experience with various other security pictures one may not realize that the characters are not scaled at all - especially if upper case chars are combined with lower case v or similar where it's not clear.
Also password Sr,zsns. seems to be much better than abcdefghij that was accepted just fine. If 8-chars is too little, I haven't seen that warning anywhere there on registration screen.
When one doesn't know what's wrong, it can be painfull to take the right course of action.