images / headers / modrewrite

[suffeks]

ok, i have a php file that retrieves images from a db, and outputs them to the browser, which is fine. however i decided to use modrewrite so that forums are happy with the 'normal' urls, at the same time i'm watermarking images.

there is 1 little problem, when the images are linked on a forum, they show up fine, such as this:

however, when you try accessing http://www.servfiles.com/1071/ directly in anything BUT IE it's gibberish, can anyone help?

thanks

here's kinda some code:

//[...]
function watermark($savedname, $origname) {
		$imagesource =  $origname;
		$filetype = substr($imagesource,strlen($imagesource)-4,4); 
		$filetype = strtolower($filetype); 
		if($filetype == ".gif")  $image = @imagecreatefromgif($savedname); 
		if($filetype == ".jpg")  $image = @imagecreatefromjpeg($savedname); 
		//if($filetype == ".png")  $image = @imagecreatefrompng($savedname); 
		if (!$image) die(); 
		$watermark = @imagecreatefromgif('images/watermark.gif'); 
		$imagewidth = imagesx($image); 
		$imageheight = imagesy($image); 
		$watermarkwidth =  imagesx($watermark); 
		$watermarkheight =  imagesy($watermark); 
		$startwidth = 10; //(($imagewidth - $watermarkwidth)/2); 
		$startheight = $imageheight - $watermarkheight - 10; //(($imageheight - $watermarkheight)/2); 
		imagecopy($image, $watermark,  $startwidth, $startheight, 0, 0, $watermarkwidth, $watermarkheight); 
		if($filetype == ".gif")  imagejpeg($image); 
		if($filetype == ".jpg")  imagejpeg($image);  

		if($filetype == ".png")  imagepng($image);
		imagedestroy($image); 
		imagedestroy($watermark);

}
//[...]
//WATERMARK, IF IMAGE FROM ABOVE CHECK
		$filetype = substr($origname,strlen($origname)-4,4);
		$filetype = strtolower($filetype);
		if($result) {
			if($filetype == ".jpg" || $filetype == ".gif") { //$filetype == ".gif" || || $filetype == ".png"
				watermark($savedname, $origname);
			}
		}
//[...]
//THE SOURCE OF THE FILE GRABBED FROM THE SERVER, SKIP IF IMAGE
if($filetype != ".gif") {
	if($filetype != ".jpg") {
		//if($filetype != ".png") {
			//TYPE OF FILE TO BE OUTPUTTED
			header($type);
			//THE NAME OF THE FILE TO BE DOWNLOADED
			header($origname);
			readfile($savedname);
		//}
	}
}