more general message when slave can't start because of incorrect
replication information, the previous one was sometimes a misleading
indication (i.e. sometimes the problem had nothing to do with
system permissions).
The perfect fix would be to report the exact error to the client
(instead of pointing the client to the error log); this is a bit
of work so it's more a development task:
WL#1088 "Move all hardcoded messages of replication to share/errmsg.txt".
I was not able to modify the errmsg.txt in these sql/ subdirectories:

danish
dutch
german
italian
portuguese
russian
spanish
swedish
ukrainian

into mysql.com:/home/mysql_src/mysql-4.0

"EE_ error codes (EE_DELETE, EE_WRITE) end up in the binlog, making slave stop".
The problem was that during execution of the command on the master, an error
can occur (for example, not space left on device, then mysqld waits and when
there is space it completes successfully: so finally it worked but the error
EE_WRITE remains in thd->net.last_errno and thd->net.last_error).
To know if finally the command succeeded, we test the 'error' variable in
every place, and if it shows no failure we reset thd->net.last_err* using
the function THD::clear_error() which is backported from 4.1.
A new test to see if now only real errors get to the binlog (note: the test
uses "rm").

Also a bit of memory free/alloc saving in log_event.cc (do not free the whole
mem_root after every query in the slave SQL thread: we can keep the initial
block of it; which will be freed when the thread terminates).

Don't dump data for MRG_ISAM or MRG_MYISAM tables. (Bug #1846)
Ensure that 'lower_case_table_names' is always set on case insensitive file systems. (Bug #1812)
One can now configure MySQL as windows service as a normal user. (Bug #1802)
Database names is now compared with lower case in ON clause when lower_case_table_names is set. (Bug #1736)
IGNORE ... LINES option didn't work when used with fixed length rows. (Bug #1704)
Change INSERT DELAYED ... SELECT... to INSERT .... SELECT (Bug #1983)
Safety fix for service 'mysql start' (Bug #1815)

into sinisa.nasamreza.org:/mnt/work/mysql-4.0

customer and Dean Ellis.

into mysql.com:/my/mysql-4.0

   instead.

into mysql.com:/my/mysql-4.0

into rurik.mysql.com:/home/igor/dev/mysql-4.0-1

into eagle.mysql.r18.ru:/home/vva/work/BUG_2023/mysql-4.0

(bug #2023)

into sinisa.nasamreza.org:/mnt/work/mysql-4.0

into deer.(none):/home/hf/work/mysql-4.0.1224

  Fix bug: if one updated a secondary index column so that its alphabetical value did not change (e.g., abc -> aBc) and rolled back the update, InnoDB failed to return the value in the secondary index to its original value
row0upd.h:
  Correct typing error
sync0sync.ic:
  Remove inadvertently pushed sync debug code

into eagle.mysql.r18.ru:/home/vva/work/BUG_1951/mysql-4.0

 - Reworked testing for gcc3 in the RPM spec file a bit

as is thread_id has type ulong
(bug #1951 thread id is printed as "signed" instead of "unsigned" in 'mysql')

  Simplification of the previous fix for multi-update/delete.

Fixed problem with char > 128 in QUOTE() function. (Bug #1868)
Disable creation of symlinks if my_disable_symlink is set
Fixed searching of TEXT with end space. (Bug #1651)
Fixed caching bug in multi-table-update where same table was used twice. (Bug #1711)
Fixed problem with UNIX_TIMESTAMP() for timestamps close to 0. (Bug #1998)
Fixed timestamp.test

Update after discussion with Monty

it happens because of the LEFT JOINT optimization in add_key_part()
This optimization does exactly the same in JOIN and in WHERE conditions 
Not right.
I moved that optimization one level upper.

strcpy changed to strmake

we didn't specify thd->priv_host properly

  Remove wrong debug assertion and comment

  Fix assertion failure on line 713 of row0upd.c if there is a column prefix index and the last characters in the prefix are spaces: do not assume that the length of alphabetically equal strings is the same; fix a buglet which could cause InnoDB to think that a secondary index record was not locked though it had been updated in a way which did not alpahabetically change its value, e.g., abc -> aBc

into mysql.com:/home/dlenev/src/mysql-4.0-mydir2

"SHOW TABLE STATUS very slow w/large number of tables"
Replaced old algorithm which were used in my_dir() and stored
all information about directory entries in one chunk of memory
with new one which stores file names and MY_STAT structures in
separate memroot, so now we don't need to copy this data during
reallocation of dir_entry array.

into rurik.mysql.com:/home/igor/dev/mysql-4.0-1

  Fixed a bug causing a crash for multi-update/multi-delete
  with impossible where (bug #1860).