Fix typo: occured -> occurred (#1489366)

Aleksander Machniak

2013-10-04 57b44d2339c4ab0ca07ca2f3884445e5523aa2bb

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.panel_wrapper {height:85px;} 
.panel_wrapper div.current {height:85px;} 
 
/* IE */ 
* html .panel_wrapper {height:100px;} 
* html .panel_wrapper div.current {height:100px;}