June 15th – June 20th Thunderbird Checkins [Latest bug-fixes 1st]
Since ~19th Nov 03: 226176 – Import of an Outlook 2003 address book crashes the program [Address Book]
Fixed: 244134 – Additional thunderbid patches to support the new semi single profile changes [General]
Fixed: 225158 – Thunderbird should act as an RSS newsreader, too [Mail Window Front End]
Fixed: 244800 – Minor menu item re-organization [Mail Window Front End]
Fixed: 239929 – Semi-Single-Profile for firefox and the new-toolkit apps [Migration]
Fixed: 246759 – Interface missing to setup movemail account [Account Manager]

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 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