pg_upgrade 8.4 -> 9.1 failures

I've tried the upgrade a few times, but I always get one type of failure
or another.

Performing Consistency Checks
-----------------------------
Checking current, bin, and data directories ok
Checking cluster versions ok
Checking database user is a superuser ok
Checking for prepared transactions ok
Checking for reg* system oid user data types ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for large objects warning

| Your installation contains large objects.
| The new database has an additional large object
| permission table. After upgrading, you will be
| given a command to populate the pg_largeobject
| permission table with default permissions.

Creating catalog dump ok

There were problems executing "/usr/local/pgsql_84/bin/pg_ctl" -w -l
"/dev/null" -D "data84" stop >> "/dev/null" 2>&1
Failure, exiting

=========================================

Performing Consistency Checks
-----------------------------
Checking current, bin, and data directories ok
Checking cluster versions ok
Checking database user is a superuser ok
Checking for prepared transactions ok
Checking for reg* system oid user data types ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for large objects warning

| Your installation contains large objects.
| The new database has an additional large object
| permission table. After upgrading, you will be
| given a command to populate the pg_largeobject
| permission table with default permissions.

Creating catalog dump ok
Checking for prepared transactions ok
Checking for presence of required libraries ok

| If pg_upgrade fails after this point, you must
| re-initdb the new cluster before continuing.
| You will also need to remove the ".old" suffix
| from /home/postgres/data84/global/pg_control.old.

Performing Upgrade
------------------
Adding ".old" suffix to old global/pg_control ok
Analyzing all rows in the new cluster ok
Freezing all rows on the new cluster ok
Deleting new commit clogs ok
Copying old commit clogs to new server ok
Setting next transaction id for new cluster ok
Resetting WAL archives ok
Setting frozenxid counters in new cluster ok
Creating databases in the new cluster ok
Adding support functions to new cluster ok
Restoring database schema to new cluster ok
Removing support functions from new cluster ok
Restoring user relation files

Mismatch of relation names: database "dbname", old rel
pg_toast.pg_toast_1280475, new rel pg_toast.pg_toast_1202320
Failure, exiting