Dec 12 - Fitch Ratings notes that the Dun & Bradstreet Corp. (D&B) has not made any announcements regarding any strategic changes to the company's capital structure or ownership. However, news organizations have recently reported that D&B is no longer pursuing a sale of the company (media reports issued in July/August indicated the company was exploring a sale). Fitch believes the event risk of a leveraged buyout (LBO) of D&B (solicited or unsolicited) will be an overhang on the credit for the n