Thank you for reporting this bug. Could you specify which version of firefox and ubuntu are you using? I cannot reproduce this bug in ubuntu 12.04 with firefox 14.0. If I try to save a text file from firefox and rename it so as to start with a dot, the file is correctly saved with the expected initial dot. When I try again and overwrite the file, I see no removal of the initial dot.
Thank you for reporting this bug. Could you specify which version of firefox and ubuntu are you using? I cannot reproduce this bug in ubuntu 12.04 with firefox 14.0. If I try to save a text file from firefox and rename it so as to start with a dot, the file is correctly saved with the expected initial dot. When I try again and overwrite the file, I see no removal of the initial dot.