In the source package, an SQL script is included which lobs stuff into the database for a base install, including the system styles.
Problem is, it puts them in with the styleids they have on LiveJournal, the highest of which is 18550. This means that in the tables for other sites (such as DeadJournal) the vast majority of styleids up to that number are wasted and autonumbering starts at 18551.
Could the styleids be renumbered to be 1-21 in the source package, perhaps? That would make the other sites not have a massive gap in their styleids, which would be a good thing I think.