Follow-up. I'm restoring various applications, and mytube keeps failing. When I drop to root to try apt-get install mytube, I get some interesting error messages:

osso-software-version-rx34: Depends: flash-and-reboot (=3) but it is not going to be installed

Depends: initfs-flasher (=0.95.16.-200823maemo2) but it is not going to be installed

Depends: kernel-diablo-flasher (=2.6.21-200823maemo3) but it is not going to be installed.

So I'm wondering: was the flash method I used sufficient to bring everything up to date? (And that method was the single flasher command above.)