I just ran across this question and was going to flag it for closure as off topic (beta versions not supported until released) -- but the flag dialog only had spam, rude/abusive, and "other, needs moderator attention" options. I used to get an option for "should be closed because", vaguely similar to what I get for a close vote on other SE where I have that privilege (and I used to have that option in the flag dialog on askubuntu SE).
Was this changed, or is it something specific to my account?