Notice in error log after updating plugin

It’s not error, just a notice.
You can turn off logging PHP notice. Please contact server admin for more info.

That’s the thing, I’m not logging notices. I am the administrator. You sure there isn’t an ini_set or something going on?

I double checked my php.ini and it’s set to:

error_reporting = E_COMPILE_ERROR|E_RECOVERABLE_ERROR|E_ERROR|E_CORE_ERROR|E_PARSE

To verify another plugin wasn’t changing something, I put this in my theme’s functions.php:

function error_level_tostring($intval, $separator)
{
    $errorlevels = array(
        E_ALL => 'E_ALL',
        E_USER_DEPRECATED => 'E_USER_DEPRECATED',
        E_DEPRECATED => 'E_DEPRECATED',
        E_RECOVERABLE_ERROR => 'E_RECOVERABLE_ERROR',
        E_STRICT => 'E_STRICT',
        E_USER_NOTICE => 'E_USER_NOTICE',
        E_USER_WARNING => 'E_USER_WARNING',
        E_USER_ERROR => 'E_USER_ERROR',
        E_COMPILE_WARNING => 'E_COMPILE_WARNING',
        E_COMPILE_ERROR => 'E_COMPILE_ERROR',
        E_CORE_WARNING => 'E_CORE_WARNING',
        E_CORE_ERROR => 'E_CORE_ERROR',
        E_NOTICE => 'E_NOTICE',
        E_PARSE => 'E_PARSE',
        E_WARNING => 'E_WARNING',
        E_ERROR => 'E_ERROR');
    $result = '';
    foreach($errorlevels as $number => $name)
    {
        if (($intval & $number) == $number) {
            $result .= ($result != '' ? $separator : '').$name; }
    }
    return $result;
}
error_log( error_level_tostring(error_reporting(), ','));

and it spat out this:

[10-Apr-2015 19:56:20 UTC] E_RECOVERABLE_ERROR,E_USER_WARNING,E_USER_ERROR,E_COMPILE_ERROR,E_CORE_WARNING,E_CORE_ERROR,E_PARSE,E_WARNING,E_ERROR