PHP Error for comments on protected images in newsstream

[networkCat]

I've protected the photos in fcms as described in the manual. But if I comment on a picture, a php error appear in newstream. Furthermore, the picture is not displayed because of a wrong source url: ***/fcms/gallery/photo.php?id=0&size=thumbnail

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PHP Error
Undefined index: id
File: /***/fcms/inc/Upload/Destination/PhotoGallery/Protected.php

Line: 44
Stack:
#0 __construct called at [///fcms/home.php:40]
#1 control called at [//fcms/home.php:69]
#2 displayWhatsNew called at [//fcms/home.php:94]
#3 displayWhatsNewAll called at [//fcms/home.php:276]
#4 getWhatsNewDataObject called at [//fcms/home.php:573]
#5 getPhotoSource called at [//fcms/home.php:813]
#6 getPhotoSource called at [//fcms/inc/gallery_class.php:2845]
#7 fcmsErrorHandler called at [//fcms/inc/Upload/Destination/PhotoGallery/Protected.php:44]

PHP: 5.4.9 (Linux)