OK, sorry for the late reply.
From what I can see, the problem seems to be with start++, not with your system, or files.
If you look at the generated code, near the top you can see the following line :
var SYSTEM_KIND = [ "picture" "picture" ];
This is invalid javascript. It should be :
var SYSTEM_KIND = [ "picture", "picture" ];
(with a comma)
The same is true with the SYSTEM_ITEMURL var.
I really can't see why start++ would fail for this specific query though... I don't see anything unusual in the file names.
I can't help you any further (I'm just a regular user and don't have access to the source code) so Brandon will have to check it himself.
I suggest you edit the title of the first post to "BUG: pics command" to make sure he notices it.