Correct opcode for OP_Petition in 6.1
 

is: 0x53d0

The current opcode in the file may be wrong. If so, any player petitions are going to thin air and not to your database.

This is for 6.1 servers ONLY. If you're not 6.1 then disregard this

To put this opcode in the file, edit your opcodes.conf, and look for the line that begins with OP_Petition=

Change the value after the = sign to that above.

6.1 DR1 or DR2 or both?

Since the client didn't change between the two, both.