In expression builder frontend and database case_sensitive is interpreted as follows: 0-case insesitive, 1-case sensitive
Erroneously, in server and agent case_sensiteve flag is interpreted in reverse: 0-case sensitive, 1-case insensitive

Fix is actually simple - patch include\common.h
typedef enum
{

• ZBX_CASE_SENSITIVE = 0,
• ZBX_IGNORE_CASE
  + ZBX_IGNORE_CASE = 0,
  + ZBX_CASE_SENSITIVE,
  } zbx_case_sensitive_t;

Please include this fix in future releases.

Btw, thank you very much for great piece of code anyway!