The newest version of LXTerminal replaces the use of the function "vte_terminal_fork_command" (which is deprecated) with "vte_terminal_fork_command_full". This change was however not done fully and thus the term->pid did not get set probably. This patch fixes the problem and utilizes the "vte_terminal_fork_command_full" probably.
Patch for 'lxterminal.c'
Patch for 'lxterminal.h'
OK. It is patched in git repo da64654 and is going to be released in lxterminal 0.1.12.