July 15th – July 20th Thunderbird Checkins [Latest bug-fixes 1st]
Fixed on branch: 246051 – Hang when drag attachment to desktop when the file name has an accented char [Attachments]
Fixed: 249494 – Profile Migration from Outlook Express [Migration]
Fixed: 250093 – Add profile migration from Outlook [Migration]
Fixed: 251094 – Support migration from Netscape 4.x [Migration]
Fixed: 251761 – Remove duplicate code in newsblog.js [RSS]
Fixed: 251605 – crash when doing multiple advanced address book searches [Address Book]
Fixed: 251473 – EM should support remote updating of maxVersion to avoid unnecessary download-install [Extension/Theme Manager]
Fixed: 235686 – add “x-mimeole” to list of user agents [Mail Window Front End]
Fixed: 177054 – fix all openers of the advanced ab search dialog to open a new dialog (if one is not already open), or raise the existing one (if it exists) [Address Book]
Fixed: 251418 – Expose progress notification events through nsIXMLHttpRequest [XML]

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
Since ~18th June 04: 247552 – When upgrading to 0.7, problems not finding the 0.6 profile on OS X

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