Tracks imported from CD to flac have MD5 signature mismatch

Using Banshee and Sound Juicer, I imported some tracks of two different audio CDs direct to flac, with and without error correction. All the files had an audio glitch within the first few seconds of playback but otherwise seemed fine. However, flac -t reported "ERROR, MD5 signature mismatch".

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: libgstreamer0.10-0 0.10.35.3-1
ProcVersionSignature: Ubuntu 3.2.0-14.23-generic 3.2.3
Uname: Linux 3.2.0-14-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Thu Feb 9 11:47:06 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=bash
SourcePackage: gstreamer0.10
UpgradeStatus: Upgraded to precise on 2012-01-16 (24 days ago)