Thanks Slackie1000 !
Funny thing happened... I added that line to my .vimrc, and while tapping ,, twice didn't work ( i believe my vi cmd is aliased to vim), I tried (ALT + comma), which worked.
So, I then removed that line from my .vimrc, and it still works
Ha ! So, I guess (ALT + comma) is already an alternative for Esc ?
Thank you very much for your post... I wouldn't have stumbled across this without it !