No home entry in oraInventory

Today I hit the following scenario - no agent home entry in oraInventory, while I require it when running a script for checking the db installation quality. Due to this the script reported errors in several points, while it should not.
The solution is quite strightforward. In the agent home under AGENT_HOME/oui/bin there is a script attachHome.sh.

#!/bin/sh
OHOME=
OHOMENAME=agent12c1
CUR_DIR=`pwd`
cd $OHOME/oui/bin
./runInstaller -detachhome ORACLE_HOME=$OHOME ORACLE_HOME_NAME=$OHOMENAME $* > /dev/null 2>&1
./runInstaller -attachhome ORACLE_HOME=$OHOME ORACLE_HOME_NAME=$OHOMENAME $* 
cd $CUR_DIR

The script in fact reattaches the home and after the call my script worked properly again.

ORA-00600: internal error code, arguments: [ktbConvertRedo_1]

Today we experienced a terrible disaster caused by some corrupted data in a table. It started with

ORA-04031: unable to allocate 20504 bytes of shared memory 
("shared pool","unknown object","sga heap(2,1)","KTI SGA freea")

and after several occurences also

ORA-00600: internal error code, arguments: [ktbConvertRedo_1], [], [], [..]

and then problems with SMON, after few SMON terminations also instance termination by PMON.

After some investigation we found 2 articles on Metalink (one without a clue, the 2nd one with info to set a certain event to find a corrupted object/table and to remove it).
The reason was apparently a corruption in a table - the main problem was to find the id of that object.
Finally one of us spotted the lines below:

Block recovery completed at rba 2428.149064.16, scn 31.305977921
Errors in file /oracle/diag/rdbms/sbiu_prodora03/sbiu/trace/sbiu_smon_28380.trc  (incident=230673):
ORA-00600: internal error code, arguments: [ktbConvertRedo_1], [], [], [..]
ORA-00600: internal error code, arguments: [ktbConvertRedo_1], [], [], [..]
ORA-00600: internal error code, arguments: [ktbConvertRedo_1], [], [], [..]
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
ORACLE Instance sbiu (pid = 18) - Error 600 encountered while recovering transaction (51, 6) on object 144492.

The corrupted object was the one with id 144492. After dropping the object (remember to purge recyclebin if on) database returned to normal work.
In this case we were very,very lucky as the table we dropped was kind of log of errors and we knew it - nobody will cry over some debugging info when "forests are ablaze ".