SOLVED. Install Sun Java, and choose it in OpenOffice (Tools > Options > Java).
Java is required to save as Docbook, and the Java that came with Ubuntu 6.06 is insufficient. Install Sun Java. -- OpenOffice hangs forever after choosing Save As Docbook https://launchpad.net/bugs/69707 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
