Anyway, I uploaded a new pymaemo-optify version (0.2) which should be more error-proof than before. More specifically, it will not break installation even if there are old mounts or files left behind.

To be able to get more testing ASAP, I manually promoted the package to extras-testing through the package interface, even if it is not in user/* section. Hope to not disturb QA too much

Andre Klapper: is it possible to automatically test packages in extras-testing for "disk full" conditions (maybe installing the package in a quota controlled chroot)? I know dpkg has means to recover from such errors during installation, but that depends on a carefully written preinst/prerm/postinst/postrm scripts, which maybe some packages might not do properly.