Amaya 11.1 (Jan 30 2009) crashes when removing two characters and saving

Dear Amaya experts,

Amaya 11.1 (Jan 30 2009) crashes when removing two characters and saving.
To try and reproduce the problem, please open the attached document.
Move to the bottom of the document, where you find two '@' marks.
Place the carret after the "@@", then press delete twice to delete them.
At this moment, Amaya is still okay.
Now save the document (Cntl-s or clicking a button). Amaya immediately 
quits.

I hope this can be fixed. Many thanks in advance,    Martin.
-- 
#-# Martin J. Dürst, Professor, Aoyama Gakuin University
#-# http://www.sw.it.aoyama.ac.jp   mailto:duerst@it.aoyama.ac.jp