Description:
------------
upload photo with the name {1E0557DF-2797-4E31-9908-81722ABCED19}0.jpg
It won't work, rename it to 
xxxxx.jpg,
It works.

Here is the code I used:

$uploadFileWithoutPath = "photos".basename($_FILES['PhotoUpload']['name']);

$uploadFileWithoutPath = urlencode($uploadFileWithoutPath);

$uploaddir = $PhotoDir;
$uploadfile = $uploaddir . $uploadFileWithoutPath;
$uploadfile = sprintf($uploadfile,time());

$requestValid = true;
$fileSize = $_FILES['PhotoUpload']['size'];

if($fileSize > 1000000)
{
   $requestValid = false;
}

if (move_uploaded_file($_FILES['PhotoUpload']['tmp_name'], $uploadfile)) {

  //do my stuff here.......

Reproduce code:
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http://lab.mytalentexchange.com/ 

Click a location, and click "add marker" link, try to upload a photo with the name {1E0557DF-2797-4E31-9908-81722ABCED19}0.jpg

It won't upload the photo, now rename it to 
xxxxx.jpg,
It works.