zlacker

You can't vouch for posts, only comments.

>>Philpa+(OP)
I have vouched for posts .. but it doesn't always appear as an option ...

Addendum1: I haven't compiled a detailed cross referenced list of observations about HN .. but it's got a lot of little subtle quirks from custom coding .. I suspect there's a window for submission vouching that's only open to users with certain other privlege escalations, or perhaps a stochastic element throws that chance to a random few .. eg: I have no option to vouch for this flagged submission, but I have had that option on others.

Addendum2: Jtsummers may well be right. There may also still be other odd little factors <shrug>.

>>Philpa+(OP)
You can vouch for posts, but only once they're [dead]. [flagged] is not [dead] on its own, and so nothing can be done by users yet (other than maybe reaching out to the mod). If it acquires enough flags to become [dead], then those of us with enough karma could vouch for it.

Note that the same thing is true for comments. Occasionally, but not often, you'll find a [flagged] comment that isn't [dead], you can't vouch for those either. Only once they become [dead] can they be vouched for.