create a new scenario, add new step :

Undefined index: steps_names [views/configuration.httpconf.popup.php:29]
Invalid argument supplied for foreach() [views/configuration.httpconf.popup.php:29]

this only happens for the very first step in a new scenario.

regression, broken by :

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r32243 | oleg | 2012-12-20 11:03:37 +0200 (Thu, 20 Dec 2012) | 1 line

..F....... ZBXNEXT-20 fixed steps validation in configuration of monitoring