This bug actually has existed from RC4 through 3.0.2.  It only happens in the Windows version.  
It works fine on our Solaris box. 

This script should print a table.  The first row has all the files, the second has the file size.

<?
	print("<TABLE BORDER=\"1\">\n");

	$myDirectory = opendir(".");

	print("<TR>\n");
	print("<TH>Filename</TH>\n");

	while($entryName = readdir($myDirectory))
	{
		print("<TD>$entryName</TD>\n");
	}

	print("</TR>\n");

	rewinddir($myDirectory);

	print("<TR>\n");
	print("<TH>Size</TH>\n");

	while($entryName = readdir($myDirectory))
	{
		print("<TD>" . filesize($entryName) . "</TD>\n");
	}

	print("</TR>\n");
	
	closedir($myDirectory);

	print("</TABLE>\n");
?>