Snapshots of the source code can be made on demand now that the code is hosted on github. A snapshot is a copy of the bleeding edge source code. It may contain features that have not been fully tested and it may not even build. Use these if you want to try a new feature that has been added, but not yet released.
To get a snapshot, use a variation of this url: https://github.com/sleuthkit/sleuthkit/zipball/X. Replace X with 'master' if you want the most cutting edge code. Replace it with 'sleuthkit-3.2' if you want the latest version of code in the 3.2 version path. The github site provides links to these locations as well.
Note that the contents of snaphots in branches sleuthkit-3.2 and earlier are not the same as a normal source code release. These files do not have a configure script in them because the autoconf / automake / libtool scripts have not been run on them.
To use these older snapshot, your system must have autoconf, automake, and libtool installed.
If you have find any errors with the build, please send e-mail to sleuthkit-developers <at> lists {dot} sourceforge [dot] net.