No, I'm using Mozilla Firebird
Maybe it's a specific bug of the french version of SPx
Curiously, this didn't happen since I switch to .24.7b3
Yesterday, I switched back to the Indiestep (because I'm playing with OTS2) but the problem didn't occurs yet...
wait and see

Update
The problem only occurs with Indiestep, not .24.7; I'm sure, now