June 10th – June 14th Thunderbird Checkins [Latest bug-fixes 1st]
Fixed: 246606 – Show more information in the add/remove programs list [Installer]
Fixed: 242672 – Help menu should conform to Apple Human Interface Guidelines [Mail Window Front End]
Fixed: 245483 – Hook up print preview support [Mail Window Front End]
Fixed: 246414 – Drafts & Templates don’t remember background and font colors [Message Compose Window]
Fixed: 245552 – default character encoding option for outgoing mail is unusable [Preferences]
Fixed: 139242 – News: Thread with new messages spontaneously expands [Mail Window Front End]
Fixed: 245325 – [Contacts side bar is empty in the compose window] and [“Add to Address Book …” pane isn’t filling in] [Message Compose Window]
Fixed: 245430 – Investigate static build version of thunderbird [Build Config]

Top critical & blocker bugs:
Since ~19th Aug 03: 215183 – Program freezes when opening large (over 100K) messages
Since ~26th Aug 03: 214342 – Program fails to display folders with large numbers of emails in them(13,000)
Since ~22nd Sep 03: 219372 – The filename of the attachments become wrong with huge email i.e. 271 files – 2.5 Mb
Since ~22nd Sep 03: 219689 – After login, gets stuck at “Getting server configuration info”
Since ~6th Nov 03: 224878 – pop account permanently blocked with hourglass
Since ~19th Nov 03: 226176 – Import of an Outlook 2003 address book crashes the program
Since ~19th Apr 04: 240819 – Crash in mail.dll when checking mail
Since ~24th Apr 04: 241609 – [Mac only] crash at 0x00706d68 NSGetModule + 0x2374 when selecting messages in INBOX
Since ~10th May 04: 243167 – Platform-specific en-mac/unix/win.jar localization files not all included for each distribution
Since ~12th May 04: 243442 – [Mac only] Crash on Mac OS X when sending e-mail
Since ~25th May 04: 244601 – Mail inside local mailbox lost after getting mail from POP3 server

Interesting bug:
Since ~18th Dec 00: 58612 – Need realtime spellchecking mechanism