There is a workaround for this error at the moment - when you click to Tweet a product and get this error, you will see a box that looks like this. You can click 'My product does not contain banned words' (as long as the product and words do not violate Twitter's Ad Policies) and you will be able to tweet the product :)
This has happened to us at our new Shopify retail site, FULL-RACK.com.
The best way to fix it is to keep cutting and pasting out all your banal sentences 1 by 1 to try and find the offensive needle in naughty haystack.
FULL-RACK LADY SAYS:
"I shudder to think what would happen if I child were to read about industrial shelving described using the foul language such as: "19.69." And what kind of twisted individual would submlinally promote drinking at a bar by hiding that word in their product descriptions?