Two different incident reports from the Official USPS Web Site:
"On June 14, 2002, a former mail handler at the Tampa, Florida, Processing and Distribution Center (P&DC) was sentenced to 18 months in prison, three years' supervised release, and restitution of $21,295 to Netflix, Inc. , an online DVD rental company that mails millions of DVDs to addresses throughout the country. After numerous complaints from Netflix about missing DVDs that customers claimed they had mailed back to the company, Postal Inspectors identified the postal employee in November 2001 for the crime. Inspectors recovered thousands of the company's DVDs while searching the subject's vehicle and residence, with losses exceeding $100,000. As a result of this investigation, Postal Inspectors are now working closely with Netflix on a national level to increase mail security."
"In June 2003, Netflix, Inc., a major retailer that rents DVDs via the U.S. Mail, asked Los Angeles Postal Inspectors for help when it encountered problems with mail theft. Inspectors tracked the cause to four Netflix employees who worked in the mailroom and an outside co-conspirator, who together were believed to have stolen more than 1,000 DVDs-plus another 403 on the day of their arrests. The employees opened the DVDs in the mailroom and placed them in the trash, then paid a collaborator to pick them up from Netflix's outside garbage dumpsters. They sold the stolen DVDs for $2 to $3 each. The employees lost their jobs, and prosecution is pending."
I recommend you report each lost DVD to your local Postmaster , just to protect yourself, in case it is part of a larger problem.