I have an SNMP item with type of information is Character.
The value of SNMP OID is integer, ex:

zabbix:/home/DOMAIN/kbp% snmpwalk -v2c -c public 192.168.20.114 CISCO-VLAN-MEMBERSHIP-MIB::vmVlan.10103
CISCO-VLAN-MEMBERSHIP-MIB::vmVlan.10103 = INTEGER: 100

But the value collected by Zabbix is float but stored as character (11 bytes):
"100.000000"

In Zabbix 2.2 the value had collected as character/integer:
"100"