Libre Office needs Java so the lomanager downloads that first, pay some attention to it in the first windows that pop up. Check your menu, if correct you can find Sun Java 6u26 under More Applications.
Although not necessary, I always install java
as part of the bunch of packages I always install on a newly installed
system, along with kdepim4 - luckyBackup - Filezilla - KeePassX etc etc...
Then when I do eventually run lomanager
it hasn't got to bother with java, but as I say this isn't necessary, just my way of doing things.........