i have noticed over time that these are becoming increasingly harder to read as time goes on. No seriously, the programs that people are creating to read and solve capthchas are becoming more sophisticated, so the people who make them have to make even more complex ones. This make it very difficult to enter them for websites, making accounts, etc. i think there will eventually be a point where they become unreadable to just about everyone, and they have to replace the whole screwy system. The question is, what will they replace it with? Thats my two cents.