Ok,
Your php function do not suppord this charset, therefore you can do 2 things:
a) change your charset into one of these :
ISO-8859-1, ISO-8859-15, UTF-8
but it is not sugested and very problematic
b) you can simply turn off warnings by adding "@" before function in line 281:
before:
PHP Code:
$content = htmlspecialchars($content,ENT_COMPAT,vB_Template_Runtime::fetchStyleVar('charset'),false);
after:
PHP Code:
$content = @htmlspecialchars($content,ENT_COMPAT,vB_Template_Runtime::fetchStyleVar('charset'),false);
Let us know if problem is solved