Zabbix agent doesn't strip BOM from the first value of the log file. This can lead to problems with triggers that are based on regular expressions or string matching.

Item:

logrt[C:\Users\Zabbix\Desktop\agentd\log\perf1.log,Error|Critical,UTF-16]

Result:
see the attached bom_log.png file.

We should include an option for stripping BOM since there can be log files with and without BOM.