Fixed PHP warning, added check for allowed characters in variable name

Aleksander Machniak

2012-07-23 c9dcb83132da6df4e601f5991727b010a08766d6

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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;}