Error when slideshow is stopped

[Proud]

When I either click on "stop slideshow" or click to go back to the album list this is the error I am getting at the top of my page, if I hit refresh it disappears.

Warning: Variable passed to each() is not an array or object in /home/princes1/public_html/Proud/PicturePlayground/cpg1.3.1/displayimage.php on line 92

Here is what line 92 looks like in that file

       while(list($idx,$val) = each($matches)){

any ideas how to stop it from happening?