bzcat corrupts when reading from pipeline

[Neil Wilson]

Binary package hint: bzip2

dd if=/dev/urandom of=/tmp/fred bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 21.7055 s, 4.8 MB/s
neil@lenovo-3000-n100:~$ zcat -f < /tmp/fred | bzcat -f > /tmp/jim
neil@lenovo-3000-n100:~$ diff /tmp/fred /tmp/jim
Binary files /tmp/fred and /tmp/jim differ

neil@lenovo-3000-n100:~$ bzcat -f < /tmp/fred | zcat -f > /tmp/jim
neil@lenovo-3000-n100:~$ diff /tmp/fred /tmp/jim

neil@lenovo-3000-n100:~$ bzcat -f < /tmp/fred > /tmp/jim
neil@lenovo-3000-n100:~$ diff /tmp/fred /tmp/jim

neil@lenovo-3000-n100:~$ zcat -f < /tmp/fred > /tmp/jim
neil@lenovo-3000-n100:~$ diff /tmp/fred /tmp/jim

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: bzip2 1.0.5-4
ProcVersionSignature: Ubuntu 2.6.32-24.41-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
Architecture: amd64
Date: Fri Aug 20 14:03:30 2010
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: bzip2

[strowger (strowger)]

I'm also seeing this on Lucid amd64, output below; bzcat corrupts data when reading from a pipe?

strowger@beast:~/bztest$ dd if=/dev/urandom of=/tmp/fred bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 14.982 s, 7.0 MB/s
strowger@beast:~/bztest$ zcat -f < /tmp/fred | bzcat -f > /tmp/jim
strowger@beast:~/bztest$ diff /tmp/fred /tmp/jim
Binary files /tmp/fred and /tmp/jim differ
strowger@beast:~/bztest$ bzcat -f < /tmp/fred | zcat -f > /tmp/jim
strowger@beast:~/bztest$ diff /tmp/fred /tmp/jim
strowger@beast:~/bztest$ zcat -f < /tmp/fred > /tmp/jim
strowger@beast:~/bztest$ diff /tmp/fred /tmp/jim
strowger@beast:~/bztest$