The way that zabbix_sender evaluates data from inputfiles (starting at src/zabbix_sender/zabbix_sender.c:395 for 2.0.6) does not take multi-line responses into account.
Solution: either the 'fgets' method of reading new lines should be aware of multi-line responses, or the 'value' part of the input file should allow for a 'coded' form of newline characters, like '\n'.