Every time when new oracle home is installed there is a wish
to apply latest patches and also some other patches to avoid
as much as possible problems/errors in the future.
I was installing new 10.2.0.4 oracle home recently and while
checking Metalink I found "bundle patches" for CRS, RAC
and for a database in general:
10.2.0.4 RAC RECOMMENDED BUNDLE #2
10..2.0.4 CRS BUNDLE2 TRACKING BUG
10.2.0.4 GENERIC RECOMMENDED BUNDLE# 3.
It is also worth doing to check bugs that appeared after the patchset
as for 10.2.0.4
10.2.0.4 Patch Set - Availability and Known Issues
Have a good day!