Why is the snmp error message "truncating unsigned value to 32 bits" moved to a debugging message in net-snmp-5.3.2.2-9.el5 or later?

Issue

• RHEL5 system is using net-snmp-5.3.2.2-7.el5 and snmp reported the following error message after the system was rebooted.

    truncating unsigned value to 32 bits (11)

• Above error message has been moved to a debugging message in net-snmp-5.3.2.2-9.el5 or later with the following patch of BZ#528164.

• net-snmp-5.3.2.2-truncate-32.patch

    528164: Spurious "truncating unsigned value" errors

    Source: upstream, SVN rev. 16762

    --- net-snmp/snmplib/asn1.c     (revision 16761)
    +++ net-snmp/snmplib/asn1.c     (revision 16762)
    @@ -220,13 +220,13 @@
                 x = 0 - (x & 0xffffffff);
             }
             if (trunc)
    -            snmp_log(LOG_ERR,"truncating signed value to 32 bits (%d)\n",y); 
    +            DEBUGMSG(("asn","truncating signed value to 32 bits (%d)\n",y)); 
         } while(0)

     #  define CHECK_OVERFLOW_U(x,y) do { 
             if (x > UINT32_MAX) {
                 x &= 0xffffffff; 
    -            snmp_log(LOG_ERR,"truncating unsigned value to 32 bits (%d)\n",y); 
    +            DEBUGMSG(("asn","truncating unsigned value to 32 bits (%d)\n",y)); 
             }
         } while(0)
     #endif

• Why has it been moved to a debugging message?
• What are values which can be greater than 32 bits length, for instance?
• Exactly what does the parenthesized number (e.g. "(11)") shown in the end of   the message mean?