In case that you need to patch Oracle, Too!

Patch:

https://updates.oracle.com/ARULink/PatchDetails/process_form?patch_num=6810189&release=80102040&plat_lang=912P&patch_num_id=939957&email=sam.roy%40toshiba-teg.com&userid=ml-roysam&

A good reference:

http://babudba.blogspot.com/2008/09/upgrade-oracle-from-10201-to-10204.html

Watch for Time Zone update:

http://www.oracle.com/technology/pub/notes/daylight-saving-time-update-guide.html

Assuming you have access to Metalink -:) Reference links: Link 1 and Link 2

Again, always consult with your Oracle support for assistance......