You shouldn't be deleting files. You should have just disabled the plugin so it doesn't execute.
It looks like you have error reporting set to include E_STRICT errors. Changing that might fix things.
You could also try commenting out line 37 of that /home/fireflytheatre/core/model/smarty/plugins/modifiercompiler.escape.php file:
// $char_set = smarty_literal_compiler_param($params, 2, Smarty::$_CHARSET);
and adding this below it:
$char_set = smarty_literal_compiler_param($params, 2, Smarty::$_SMARTY_RESOURCE_CHAR_SET);
You'll also have to change line 41:
$char_set = Smarty::$_CHARSET;
$char_set = Smarty::$_SMARTY_RESOURCE_CHAR_SET;
This looks like a bug in the Smarty code, but I don't know why it's just hitting you.