by MAX/MIN in some cases:
SELECT coercibility(max(s1)) from t1;

Subselect collation and derivation was not processed
correctly:

create table a select (select s1 from t1);
select * from t1 where s1 = (select s2 from t1);

(fixed BUG#943)

count HAVING clause elements with select list elements, because agregate function can be present in it (BUG#922)
removerd unused loop_id

(resolving fields of reduced subselect)

test moved to other bug 

fixed BUG #726

fixed bug of current select pointer in subselect execution
fixed layuot

outer resolved fields now do not marked as dependent if they is not really belong to outer SELECT
one-letter variables name fixed

bmove_allign -> bmove_align
Added OLAP function ROLLUP
Split mysql_fix_privilege_tables to a script and a .sql data file
Added new (MEMROOT*) functions to avoid calling current_thd() when creating some common objects.
Added table_alias_charset, for easier --lower-case-table-name handling
Better SQL_MODE handling (Setting complex options also sets sub options)
New (faster) assembler string functions for x86

(bug #518 fixed)

Added initialization of all important global variables

Allow syntax CREATE TABLE t1 (LIKE t2)

Fixed memory leak in new filesort code
Optimzed sub selects to use keys with outer references.
Increased max tables in join to 62

fixed mustiupdate subselect compatibility

(bug 217)

  this implementation have limitation: prohibited subselect in ORDER BY dependence of most outer query (will be solved after removing passing first select_lex as fake select for global mysql_select())

Optimize depending sub querys
Remove valgrind warnings

Added lengths for all MYSQL_FIELD string parameters
Changed field length to 2 byte in .frm files

new fatal_error interface to assign is_fatal_error and ne.report_error
commant about Item_row

fixed length of fields created in fubselect
fixed resolving fields of reduced in derived table subselect

merging with switching on static tables optimization (SCRUM)
fixed subselects with uncacheable results
added test for fixed bugs from bugreports

Automatically add SQL_BUFFER_RESULT if INSERT is done from 
SELECT comprising a table to be inserted in.

after merge fix of 577 task (SCRUM, pre commit to be able to merge with static tables optimization fix)
fixed derived tables with subselect inside

fixed memory leacks

Cleaned up test; Removed wrong DROP TABLE commands and use standard table and database names.
changed store_warning() -> push_warning_print()