There are (or were) two ICO reviews with no score. It's just a glitch in the system - people have explained it to you before. I honestly can't say it's worth pointing out this way all the time, especially when you leave no other comment on the review.
I suppose the only consolation for that is that most of these no-score reviews were written by people who aren't around anymore or who just subbed something and left without following up.
[Eating EmP's brain] probably isn't a good idea. I mean... He's British, which means his brain's wired for PAL and your eyes are NTSC. - Will