chymax$ xattr -l Thunderbird\ 2.0.0.12.dmg 
com.apple.diskimages.fsck:
0000   07 81 39 70 9B 8F 99 34 50 A3 A1 72 98 C1 D1 15    ..9p...4P..r....
0010   C6 C5 3B 6F                                        ..;o

com.apple.diskimages.recentcksum: i:7532740 on 3206B5BA-795C-376B-9D61-C814606EAE9C @ 1216924067 - CRC32:$C95F69FC
com.apple.quarantine: 0000;4888c9a0;Firefox;|org.mozilla.firefox