[rtmpdump] download PBS.ORG video useing 2.3 OK, but not 2.4

Wed Feb 20 10:59:14 CET 2013

like:
rtmpdump -r "rtmp://sdwfchwqitj2v.cloudfront.net/cfx/st/mp4:cove2.0/frontline/1e2c5023-ee29-4d7f-9cf8-c85647b118d5/hd-mezzanine-16x9/lanzac-mp4-800k-16x9.mp4"
-o D:\01.mp4
2.4 will show: "...
ERROR: Closing connection: NetStream.Play.StreamNotFound"

but 2.3 will download OK
show: "...
Starting download at: 0.000 kB
INFO: Metadata:
..."