RMAN hangs after 10.2 upgrade

We recently upgraded a dozen or so databases from 9.2.0.(6|7) to 10.2.0.2 + patch 10 on Win32. Now when we execute a 'connect target' in RMAN, it runs very slow - a 'show all' command takes a couple minutes to complete. 'exit' takes ~5 minutes. We're not using a recovery catalog, and our control files are around 15M. If we don't connect to the database, RMAN starts & stops very fast, as expected - it just seems to be trodding through molasses whenever it's connected to the database.  

Here's a 'show all' in one of the systems:  

using target database control file instead of recovery catalog

RMAN configuration parameters are:

CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 21 DAYS; CONFIGURE BACKUP OPTIMIZATION OFF; # default

CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default

CONFIGURE CONTROLFILE AUTOBACKUP ON; CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO
'\\backupserver\orab

kup\DEV\dev_ctrl_%F';

CONFIGURE DEVICE TYPE DISK PARALLELISM 3 BACKUP TYPE TO BACKUPSET; CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default

CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default

CONFIGURE MAXSETSIZE TO UNLIMITED; # default

CONFIGURE ENCRYPTION FOR DATABASE OFF; # default

CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default

CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default

CONFIGURE SNAPSHOT CONTROLFILE NAME TO
'E:\ORACLE\DEV\102\DATABASE\SNCFBWP.ORA';
 # default  

Has anyone else seen similar problems with 10.2? We poked around in metalink but didn't see anything..  

Thanks!
Rich

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