Headers set to no cache are not honored?

[eluser]drewbee[/eluser]
I actually just popped open the output class and I can see any feasible reason it is not behaving with the same behavior.

Code:

/**
     * Set Header
     *
     * Lets you set a server header which will be outputted with the final display.
     *
     * Note:  If a file is cached, headers will not be sent.  We need to figure out
     * how to permit header data to be saved with the cache data...
     *
     * @access    public
     * @param    string
     * @return    void
     */    
    function set_header($header, $replace = TRUE)
    {
        $this->headers[] = array($header, $replace);
    }

Code:

function _output // Snip....
        // Are there any server headers to send?
        if (count($this->headers) > 0)
        {
            foreach ($this->headers as $header)
            {
                @header($header[0], $header[1]);
            }
        }

Weird...