There seems to be no meta bug for problems with the threaded view. Note: I used the following search for finding the dependencies and sorted out a few, so there might be missing or wrong bugs in the dependency list. http://bugzilla.mozilla.org/buglist.cgi?query_format=&short_desc_type=allwordssubstr&short_desc=thread&product=Browser&product=MailNews&product=Thunderbird&long_desc_type=substring&long_desc=&bug_file_loc_type=allwordssubstr&bug_file_loc=&status_whiteboard_type=allwordssubstr&status_whiteboard=&keywords_type=allwords&keywords=&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&emailassigned_to1=1&emailtype1=exact&email1=&emailassigned_to2=1&emailreporter2=1&emailqa_contact2=1&emailtype2=exact&email2=&bugidtype=include&bug_id=&votes=&chfieldfrom=&chfieldto=Now&chfieldvalue=&field0-0-0=short_desc&type0-0-0=notsubstring&value0-0-0=pane&field0-1-0=short_desc&type0-1-0=notsubstring&value0-1-0=safe&field0-2-0=short_desc&type0-2-0=notregexp&value0-2-0=priorit&field0-3-0=short_desc&type0-3-0=notsubstring&value0-3-0=multi-thread&field0-4-0=noop&type0-4-0=noop&value0-4-0=

Adding mscott and bienvenu to the CC list.

I wonder which of these should be considered for Tb3...

Summary of status quo: (You may skip these lists if you want, important information at the bottom) Open bugs: (80) 11048 - Auto-watch posted threads 36024 - customize thread association 37654 - filter on thread parent 56844 - mail toggles when return 58775 - remove threads when last header is deleted 59263 - Go next Unread Folder/Group 60578 - Configure list header view 61331 - Expand/Collapse all threads active always 64256 - shortcuts for exand collapse thread/all 64426 - remember expand all threads 65111 - delete whole thread if collapsed 68903 - view -> sort by, no thread options 72251 - sort thread count/unread options 73562 - view all watched threads 74357 - text styles for collapsed threads w/ unread 76414 - only show green icon when unread 79130 - phantom message problem 86359 - copies of replies for threading 93923 - refresh when deleting parent 99193 - enter on parent and actions occur 107000 - Quick search does wrong thing 108820 - threads with unread more obvious 109740 - add no of answers to line 109742 - expand only unread 109744 - collapse/expand subthreads 109746 - expand subthreads 110121 - AddKeys does not preallocate enough 114244 - position disagrees with style 116075 - quick serach should not hide threads 120584 - refresh thread lines 122687 - something with watched threads 122908 - collapsed w/ labeled subs should be underlined 123052 - display problems with select thread 125952 - go next/previous watched/unread thread 127309 - get first unread child returns null 133481 - right click doesn't select 135483 - + should expand thread 135738 - delete is strange 141167 - new thread by subject 141597 - default sort is bad 143489 - go next unread thread 145772 - delete in only new causes old to appear 147945 - modern -rename images 152702 - move only moves first thread 164081 - display watched threads better 164115 - diable threading by subject 165782 - expand all threads doesn't keep msg in view 169481 - delete messages in thread view is bad 178327 - new messages thread w/ same title 185695 - only first gets twisty 185801 - label mark all thread 191283 - ignore remaining threads 195832 - icon should reflect sort order 196381 - mark subthread as read 197620 - "and replies to these" in views 204644 - expand threads with replies to self 207862 - thread views in dropdown 208324 - Unread messes up view 208525 - all collapsed/expanded 214111 - drag from top message in collapsed thread 214286 - improve watch thread utility 215826 - change expand/collapse keys 216310 - messages disappear w/ threading 216673 - more shortcuts 218208 - ignore as view condition 221019 - ignore should move to next group 222238 - sort by watched/ignored status 223280 - watch/ignore in right-click 223284 - ", but for TB 223970 - threading doesn't remember collapse state 224482 - threading forgotten 226730 - slow when all msgs have same subject 227224 - filter as watched don't work 229568 - thread across folders 231945 - sort by watched threads + date 232562 - threads randomly opened 233177 - shift-click -> mark thread read 233178 - shift click -> ignore 271036 - threading displays bad 325252 - threads always expanded 218554 - DUP of 305741 (reversed thread) (not dep) Incomplete/expired: (16) 150370, 176384, 191726, 197137, 200246, 211767, 212164, 212281, 213803, 215677 221200, 222891, 224634, 226035, 227825, 229400 DUPs of fixed bugs: (14) 29179, 30747, 89560, 123021, 135326, 150970, 200163, 204965, 224030, 224064, 227722, 230773, 234009, 234801 DUPs of other deps: (8) 101886, 110318, 205034, 215021, 223931, 224355, 231186, 233187 WFM bugs: (26) 55724, 80500, 91558, 94765, 102997, 132572, 133467, 138227, 154403, 159660, 178999, 183013, 188774, 192903, 194474, 197506, 197549, 206131, 208759, 211964, 218994, 224481, 227287, 234917, 236350 WONTFIX bugs: (5) 66026, 79629, 209021, 233089, 235389 Fixed bugs: (12) 66466, 88593, 93426, 112833, 139242, 307423, 181446, 195248, 214751, 219620 231846, 262316 These deps need to be cleaned up. I recommend removing the duplicates from the list, probably the fixed, INCO/EXPIRED, and WFM as well, although probably not the WONTFIX. Several of the open bugs could use some internal triaging before cleaning the list up, as some of them appear to be dupes of one another, or fixed by proxy bug in other side, and at least a few are not threaded view issues at all. The primary classes of bugs seem to be "threads don't work as expected when collapsed", "view is wrong", "XYZ configuration is wrong", and "watch threads aren't good enough" (there's even a meta for that). It is possible that we could just make metas for these classes and then remove all deps that fall under those classes, so this would become a sort of meta-meta bug. There are also probably several bugs that are logically deps of this that are not actual deps, but I haven't looked for them, save the lone bug that a dep was duped on to. Whatever course of action is taken (save ignoring the issue) would unfortunately be a very spammy one to people.

Cancelling wanted‑thunderbird3? as this is a meta.

Removing the resolved bugs.

Removing duplicates: 218554 -> 305741 204965 -> 186789 (fixed, so not adding)