ok, 2nd try :-)
- dump the table using mysqldump incl. drop table (--opt),
- edit the create table statement in the dumpfile to utf-8 charset
- reload the data
mysql shoud be aware of the difference between client and table charset and do the conversion.
another way could be to create new table 'table_uft8' and do a insert ... select with character conversion for each field
insert into table_uft8(collumn1, collumn2, ...) select convert (collumn1 using utf8), convert (collumn2 using utf8), ... from table_org;
and then swap tables by
alter table table_org rename to table_iso;
alter table talbe_utf8 to table_org;
Andreas