Yep. Got woken up early today for this. We renewed our cert about a month and two days ago. Namecheap, the vendor, sent us the bad AddTrust cert in the bundle. They weren't updating the bundles until two days after we renewed the cert.
Same exact thing happened to me (Namecheap, PositiveSSL, renewed roughly a month ago). I went the reissue route on Namecheap and that fixed it (and I ended up with a certificate chain that is one certificate shorter).