I have a hub which is in danger of being flagged as substandard. It's a poem. Says it's too short. What should I do?

You might find this announcement helpful:

http://hubpages.com/forum/topic/4939

Perhaps add a preamble or postscript just to get the word count up?

You could discuss the poem/topic/word choice or just a little blurb about you or your other writing?

I would just ignore it.  Those warnings are advisories designed to head off new user mistakes and patterns of abuse that we've seen.  However, if you want the warning to go away you could add an introduction to the poem or an illustrative photo.  Before a hub is actually unpublished for a violation it will still be reviewed by a person.

Thanks, everyone. I was surprised to see that message is what caused me to panic. Silly me!!!