When rebooting a v350, some apps that were working fine suddenly disappear, leaving only a broken icon on the screen. These apps must be reinstalled. Also, apps that were uninstalled are suddenly back, and fully functional. These apps must be uninstalled again. Evidently application installation and removals are made permanent. I have no idea how removing an application reportedly frees space, if the removal is not really committed. Deleted files in ext2/3 file systems are generally irreversible (restoration is not a simple matter of renaming the file to something visible like it is on FAT32). So it's a concern that uninstallations are this dirty, and not truly freeing up the space (and tight space is the main reason Android apps get removed).