Hi,
using the latest build of the great gnubg on GNU/linux, following the manual's guideline (manual V0.16, link:
http://www.gnu.org/software/gnubg/manual/html_node/Entering-illegal-moves.html#Entering-illegal-moves) on how to enter an illegal move when transcribing matches will make you lose everything inputted so far, including moves in the present game and all earlier games.
How to reproduce:
Start a new match setting both players to human and dice to manual.
Enter moves.
Enter an illegal move following the manuals description: Play a legal move, click dice to complete turn.
Before rolling opponents dice click "Edit". Holding Ctrl down move checkers to create the position resulting from the illegal move. Click Edit.
Now only the latest roll where the illegal move was played and a line with the set board command will remain in the move list (and earlier games will have gone).
