Comment 5 for bug 58058

After almost going crazy with this, Kamion helped me find why it wouldn't work.

The desktop CD has a preseed/ folder at the root that contains the file to be kept in Ubiquity (or installed rather), including the language packs.

Attached is the new ichthux.seed. It is also necessary to fix the isolinux.cfg with ichthux.seed instead of kubuntu.seed.