hello team, the class RevSliderOutput have a issue on line 1922:

$isMobile = strstr($_SERVER['HTTP_USER_AGENT'],'Android') || strstr($_SERVER['HTTP_USER_AGENT'],'webOS') || strstr($_SERVER['HTTP_USER_AGENT'],'iPhone') ||strstr($_SERVER['HTTP_USER_AGENT'],'iPod') || strstr($_SERVER['HTTP_USER_AGENT'],'iPad') ? true : false;

if($disable_on_mobile == 'on' && $isMobile)

return false;

$show_alternate = $this->slider->getParam("show_alternative_type","off");

if($show_alternate == 'mobile' || $show_alternate == 'mobile-ie8'){

if($isMobile()){ <-- line 1922

$show_alternate_image = $this->slider->getParam("show_alternate_image","");

should be:

if($isMobile){ <-- line 1922

$show_alternate_image = $this->slider->getParam("show_alternate_image","");

this make a blank page on joomla 2.5

sheers