"Error cracking CSS key"

[Gareth McCaughan]

I'm using
libdvdcss 1.2.8
FreeBSD 4.9
x86 (more precisely, Athlon)
Sony DRU-510A drive

I have never (knowingly) set the region on the DVD drive.

Many DVDs play with no problem, but a recent acquisition
(Office Space, PAL, region 2) produces the following behaviour
with DVDCSS_VERBOSE=2. The following is with ogle 0.9.2,
but much the same happens with Xine. A few of the output
lines may be from Ogle rather than from libdvdcss or libdvdread.

---------- transcript begins ----------
libdvdread: Using libdvdcss version 1.2.8 for DVD access
libdvdcss debug: opening target `/dev/acd0c'
libdvdcss debug: using libc for access
libdvdcss debug: disc is scrambled
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: GetASF authenticated, ASF=1
libdvdcss debug: decrypting disc key with player keys
libdvdcss debug: decrypted disc key is 1a:64:40:44:00
libdvdcss debug: using CSS key cache
dir: /home/gjm11/.dvdcss/OFFICE_SPACE#2003041012214000/
libdvdread: Using libdvdcss version 1.2.8 for DVD access
libdvdcss debug: opening target `/dev/acd0c'
libdvdcss debug: using libc for access
libdvdcss debug: disc is scrambled
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: GetASF authenticated, ASF=1
libdvdcss debug: decrypting disc key with player keys
libdvdcss debug: decrypted disc key is 1a:64:40:44:00
libdvdcss debug: using CSS key cache
dir: /home/gjm11/.dvdcss/OFFICE_SPACE#2003041012214000/

libdvdread: Attempting to retrieve all CSS keys
libdvdread: This can take a _long_ time, please be patient

libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x0000012c
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_0.VOB at 0x0000919f
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x00009e8c
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_0.VOB at 0x002c91ad
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_1.VOB at 0x002c95f3
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_03_0.VOB at 0x002d3d93
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_03_1.VOB at 0x002d41d9
libdvdcss debug: getting title key the classic way
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: ioctl ReadTitleKey failed (region mismatch?)
libdvdcss debug: GetASF not authenticated, ASF=0
libdvdcss debug: lost ASF requesting title key
libdvdcss debug: resetting drive and cracking title key
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: GetASF authenticated, ASF=1
libdvdcss debug: decrypting disc key with player keys
libdvdcss debug: decrypted disc key is 1a:64:40:44:00
libdvdcss debug: cracking title key
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: non MPEG block found (end of title)
libdvdcss debug: end of title reached
libdvdcss debug: 0 of 64 attempts successful, 3266 of 11174 blocks scrambled
libdvdcss debug: title key is 00:00:00:00:00
libdvdcss error: fatal error in vts css key
libdvdread: Error cracking CSS key for /VIDEO_TS/VTS_03_1.VOB (0x002d41d9)!!
libdvdread: Elapsed time 15
libdvdread: Found 3 VTS's
libdvdread: Elapsed time 15
xscreensaver-command not found.
MsgSendEvent: Resource temporarily unavailable
MsgSendEvent: Resource temporarily unavailable
libdvdcss debug: getting title key the classic way
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: ioctl ReadTitleKey failed (region mismatch?)
libdvdcss debug: GetASF not authenticated, ASF=0
libdvdcss debug: lost ASF requesting title key
libdvdcss debug: resetting drive and cracking title key
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: GetASF authenticated, ASF=1
libdvdcss debug: decrypting disc key with player keys
libdvdcss debug: decrypted disc key is 1a:64:40:44:00
libdvdcss debug: cracking title key
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: non MPEG block found (end of title)
libdvdcss debug: end of title reached
libdvdcss debug: 0 of 64 attempts successful, 3266 of 11174 blocks scrambled
libdvdcss debug: title key is 00:00:00:00:00
libdvdcss error: fatal error in vts css key
libdvdcss error: no key but found encrypted block
WARNING[ogle_mpeg_ps]: Found a scrambled PES packet! (1)
WARNING[ogle_mpeg_ps]: Found a scrambled PES packet! (1)
<<<many similar lines snipped>>>
---------- transcript ends ----------

I haven't tried to play the offending DVD in any other system, so
I can't rule out the possibility that it's defective. (But it's newly
purchased, from a reputable shop, so that doesn't seem very
likely.)

Any suggestions? Many thanks in advance...