- Conventional export is no longer supported
- Alert / trace file locations are different
- New passwords are case sensitive by default
- The exact value of internal SGA overhead, or Startup overhead in Shared Pool, is listed in the new v$sgainfo view
- job_queue_processes parameter is non-basic in 11g
- Transparent Data Encryption at Tablespace Level (Metalink note 432776.1)
- Case sensitive passwords and strong user authentication (Metalink Note 429465.1)
Will update this list, as and when I come to know about the changes.