Amarok 1.4 not rebuilding collection

mostly a reminder to myself:

When Amarok 1.4 refuses to rebuild it's collection, even when starting with a new configuration, try "touch /dir/to/mp3".

PS. Yes, I still use Amarok 1.4. Dynamic playlists have become a requirement for me. While the "fuzzy" playlists of Amarok 2 are a nice idea, they do not provide the level of control that is available in Amarok 1.4.

The real show-stopper for me is that there are no relative time intervals in Amarok 2. I want to be able to ask for "All tracks that have not been played in the last 3 months". Amarok2 only supports absolute times (eg "All tracks that have not been played since 01-01-2003").

PS2. What I want is queries like:
(rating == 5 && last_played > 3 months) ||
(rating == 4.5 && last_played > 4 months) ||
(rating == 4.0 && last_played > 5 months)
I'll probably have to write it myself.