People who use RAC to control additional, non-oracle resources, probably also create a "Virtual IP" resource.
After patching 10.2.0.1 -> 10.2.0.3, the file usrvip (handles creation/deletion of Virtual IPs) gets two buggy lines:
Yes, it looks like windows, and yes, it doesn't work 😉
To fix it, just replace %ORA_CRS_HOME% with $ORA_CRS_HOME or put the actual path, depends if $ORA_CRS_HOME is available at that context.
I've learned some things from this issue:
1. Patching up does not always help to fix bugs, sometimes it creates them! (I know it's trivial, but first time I actually SEE that)
2. Open Source (this time it was a bash script), even non-GPL, is soo important. With hardly any mentioning on the net*, we could find the bug only by inspecting the VIP scripts.
3. Community developed software such as Linux-HA, would've fixed that in two days, I believe.
* Afterwards we've found out there's a relevant Metalink Note ID: 413077.1 , and that Oracle would fix that in 10.2.0.4.