Now that the -1 for flags is denormalized, you can find out how many flags a post has if you have more than 1000 reputation.
Real life example:
A question looks like this
alt text http://www.juanformoso.com.ar/images/pre.png
And if you click the -3, you see
alt text http://www.juanformoso.com.ar/images/post.png
Instead of +1/-4.
It's easy to deduce the post has 2 flags, even if you don't have access to 10k tools:
alt text http://www.juanformoso.com.ar/images/flags.png
I'm pretty sure this isn't intended.