Upgrading your databases:
Running 'alter table mt_blog add blog_require_comment_emails tinyint'
Running 'alter table mt_entry add entry_basename varchar(50)'
Running 'create index mt_entry_basename ON mt_entry (entry_basename)'
Running 'create table mt_session (
    session_id varchar(80) not null primary key,
    session_data text,
    session_email varchar(255),
    session_name varchar(255),
    session_start int not null,
    session_kind varchar(2),
    index (session_start)
)
'
Running 'alter table mt_author add author_type tinyint not null'
Running 'alter table mt_author drop index author_name'
Running 'alter table mt_author add unique (author_name,author_type)'
Running 'update mt_author set author_type = 1 where author_type <> 2'
Running 'alter table mt_author add author_remote_auth_username varchar(50)'
Running 'alter table mt_author add author_remote_auth_token varchar(50)'
Running 'alter table mt_blog add blog_allow_unreg_comments tinyint'
Running 'update mt_blog set blog_allow_unreg_comments = 1'
Running 'alter table mt_blog add blog_allow_reg_comments tinyint'
Running 'update mt_blog set blog_allow_reg_comments = 1'
Running 'alter table mt_blog add blog_manual_approve_commenters tinyint'
Running 'update mt_blog set blog_manual_approve_commenters = 0'
Running 'alter table mt_blog add blog_old_style_archive_links tinyint'
Running 'update mt_blog set blog_old_style_archive_links = 1'
Running 'alter table mt_comment add comment_commenter_id integer'
Running 'alter table mt_comment add comment_visible tinyint'
Running 'update mt_comment set comment_visible = 1'
Running 'alter table mt_blog add blog_moderate_unreg_comments tinyint'
Running 'alter table mt_blog add blog_remote_auth_token varchar(50)'
Creating comment_pending template.

Done upgrading your schema! All went well.