Beguine, as you probably noticed, I restored your comment with the link, but forgot to reply at that time. We are not really sure why certain comments with links are spammed while others are not. It has happened to a few others as well.
The new site is using Spamfighter, which from our experience at Blogger is absolutely necessary. We will regularly check the spam cage and move unwarranted spam back. The software apparently learns from this and becomes better tuned over time. We can also try contacting the developer to get a better understanding of the problem.
Also, we may start adding regular, known users to a “white list” that should prevent any future spammings for those people.