regressiontest using bat file from wim Hueskes: C: set basedir=C:\test md %basedir% cd %basedir% md "%basedir%\firefox\updated" move "%basedir%\firefox" "%basedir%\firefox.bak" move "%basedir%\firefox.bak\updated" "%basedir%\firefox" pause 0.4.2RC1 affected 0.4.0 affected r66666 affected r65000 affected r64920 affected r64880 affected r64850 affected r64836 affected r64835 not affected (corruption not visible in explorer) r64833 not affected (corruption not visible in explorer) r64750 not affected (corruption not visible in explorer) r64490 not affected (corruption not visible in explorer) r64001 not affected (corruption not visible in explorer) r63000 not affected (corruption not visible in explorer) GUILTY (or unhiding) REVISION is r64836 [FASTFAT] pschweitzer