The BLT package is needed for libswarm. http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=611922
and the problem with BLT and TCL/TK 8.5 prevents libswarm from working properly. A patch by RedHat is available and solves the problem. The patched files can be found here, tested on Ubuntu and Debian. http://pj.freefaculty.org/Ubuntu/10.04/amd64/ Scott
