This error shows up in the problems list widget now after upgrading from 5.0 to 5.2.
A non well formed numeric value encountered [zabbix.php:22 → require_once() → ZBase->run() → ZBase->processRequest() → CController->run() → CControllerWidgetProblemsView->doAction() → CScreenProblem::makeData() → CMacrosResolverHelper::resolveTriggerDescription() → CMacrosResolverHelper::resolveTriggerDescriptions( ) → CMacrosResolver->resolveTriggerDescriptions() → CMacrosResolverGeneral->getItemLogMacros() → CHistoryManager->getLastValues() → CHistoryManager->getLastValuesFromSql() in include/classes/api/managers/CHistoryManager.php:204]
A non well formed numeric value encountered [zabbix.php:22 → require_once() → ZBase->run() → ZBase->processRequest() → CController->run() → CControllerWidgetProblemsView->doAction() → CScreenProblem::makeData() → CMacrosResolverHelper::resolveTriggerDescription() → CMacrosResolverHelper::resolveTriggerDescriptions( ) → CMacrosResolver->resolveTriggerDescriptions() → CMacrosResolverGeneral->getItemLogMacros() → CHistoryManager->getLastValues() → CHistoryManager->getLastValuesFromSql() in include/classes/api/managers/CHistoryManager.php:204]