Oracle 11.2.0.2 on Oracle Enterprise Linux 6.1, kernel bug caused log corruption on standby database. It was not a certified configuration by Oracle (historical reason beyond my control). Upgraded to OEL 6.2, log corruption disappeared. I had to use below note to roll forward standby database at times before the kernel was upgraded.
Steps to perform for Rolling forward a standby database using RMAN incremental backup when primary and standby are in ASM filesystem [ID 836986.1]
This worked well in my Non-ASM filesystem with OMF.
