You cannot change the default path (Home/user) in Libreoffice (Tools/Options/Path). I have installed Libreoffice 4 and the issue is still there. I'm not sure this is a 13.04 issue specifically because it is also present in 12.10. However, it is not an issue on 12.04 or Windows (7). It is a pity this issue is being carried over to 13.04 without being addressed. It looks to me something happened/broke in 12.10 and is still present in 13.