The version of foremost installed to backtrack 4 is 1.5.4

Latest version is 1.5.7 with following comments on updates ;

Version 1.5.7
-Added support for MP4 files
Version 1.5.6
-Added support for Office 2007 file as well as bug fixes
Version 1.5.5
-Added patch submitted by John K. Antonishek as well as cleaning
up compiler warnings and man file installation.