Well, I do, but I think that is actually causing me a problem right now. My last hub, not yet published is a poem of mine, which I wrote in 1995 or 1996, when internet was not universal yet, so I never published it. The poem is not that big. To finish the hub I've put my usual feedback paragraph and copyright mention, which turns out it's almost the same size as the poem. So as soon as I tried to publish it the mention duplicate content appeared - it says a large portion of the hub already appears on other pages - large portion can be that part. I've sent an e-mail to the Hubpages to ask for clarification, but I'm almost sure it must be that, because the poem is mine, no one has a copy, so there can't be a duplicate... Anyway, I'm waiting for a reply, but I guess I'll have to take out the feedback and copyright mention paragraph. Anyone had a similar experience?