master backup validation by restore

We validate all our database backups by shipping them to another server, restoring them and running a dbcc checkdb. Some tweaks are necessary to move the files around, but not a great problem, and it has brought some interesting problems to light before they had further consequences.

Anyhoo, since upgrading to ss08r2, we haven't been able to verify backups of the master databases using this method. They restore ok, they recover ok, but they fail dbcc checkdb as shown below. Each backup is restored to a test database rather than stomp on the ms shipped databases.

I know it doesn't make a lot of sense (outside this context) to restore a master database other than as a master database (and notably on the same sql server release), but pre-R2 it worked and on R2 it doesn't.

Source and target servers return identical values for @@version: "Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (X64) Apr 2 2010 15:48:46 Copyright (c) Microsoft Corporation Standard Edition (64-bit) on Windows NT 6.0 (Build 6002: Service Pack 2)", except the target has "(Hypervisor)" appended, presumably because it's a Hyper-V host. (I know... not a good idea).

Any ideas? Is there another way to fully check that the backup will restore without restoring as THE master database?

restore script:

restore database test 
from disk = 'E:\RemoteBackups\dogato\database\CanadaXX\master\master_backup_2010_08_03_011007_2187274.bak' 
with norecovery, 
move 'master' to 'E:\ABCDAp~1\autorestore\f1', 
move 'mastlog' to 'E:\ABCDAp~1\autorestore\f2', 
replace 

restore database test 
with recovery 

results from "dbcc checkdb ('test') with no_infomsgs":

Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=12,depid=0,depsubid=0) was found in the system table sys.syssingleobjrefs (class=12).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=13,depid=1,depsubid=0) was found in the system table sys.syssingleobjrefs (class=13).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=60,depid=1,depsubid=0) was found in the system table sys.syssingleobjrefs (class=60).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=26,depid=1,depsubid=0,indepid=3,indepsubid=0) was found in the system table sys.sysmultiobjrefs (class=26).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=13,depid=2,depsubid=0) was found in the system table sys.syssingleobjrefs (class=13).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=60,depid=2,depsubid=0) was found in the system table sys.syssingleobjrefs (class=60).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=60,depid=3,depsubid=0) was found in the system table sys.syssingleobjrefs (class=60).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=60,depid=4,depsubid=0) was found in the system table sys.syssingleobjrefs (class=60).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=60,depid=5,depsubid=0) was found in the system table sys.syssingleobjrefs (class=60).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=26,depid=259,depsubid=0,indepid=3,indepsubid=0) was found in the system table sys.sysmultiobjrefs (class=26).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=26,depid=260,depsubid=0,indepid=3,indepsubid=0) was found in the system table sys.sysmultiobjrefs (class=26).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=26,depid=261,depsubid=0,indepid=3,indepsubid=0) was found in the system table sys.sysmultiobjrefs (class=26).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=26,depid=262,depsubid=0,indepid=3,indepsubid=0) was found in the system table sys.sysmultiobjrefs (class=26).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=76,depid=65537,depsubid=100) was found in the system table sys.syssingleobjrefs (class=76).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=76,depid=65537,depsubid=101) was found in the system table sys.syssingleobjrefs (class=76).
Msg 8992, Level 16, State 1, Line 1
Check Catalog Msg 3851, State 1: An invalid row (class=76,depid=65537,depsubid=102) was found in the system table sys.syssingleobjrefs (class=76).
CHECKDB found 0 allocation errors and 16 consistency errors not associated with any single object.
Msg 8906, Level 16, State 1, Line 1
Page (1:10) in database ID 6 is allocated in the SGAM (1:3) and PFS (1:1), but was not allocated in any IAM. PFS flags 'MIXED_EXT ALLOCATED 0_PCT_FULL'.
CHECKDB found 1 allocation errors and 0 consistency errors in table '(Object ID 99)' (object ID 99).
CHECKDB found 1 allocation errors and 16 consistency errors in database 'test'.