I was mildly surprised after I unpacked the tar ball for the 1.3.1 release (http://downloads.yoctoproject.org/releases/yocto/yocto-1.3.1/poky-danny-8.0.1.tar.bz2) and it unpacked its contents directly in the directory where I was. I had assumed that there should be a "poky-danny-8.0.1" top level directory. Please compare the contents to the previous release tar ball (http://downloads.yoctoproject.org/releases/yocto/yocto-1.3/poky-danny-8.0.tar.bz2) and the difference should be obvious...
Ah, yes. I'll regen the tarballs. This is due to an autobuilder bug.
Fixed in: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-autobuilder/commit/?h=eflanagan/yocto-autobuilder-refactor&id=58499a7edbe8757733beae0bc7ca1590d937f726 1.3.1 tarballs regeneration occurring now.
This is fixed in 1.3.1 release tarballs. 1.4 shouldn't have this issue by end of day.