This is the first time I'm repporting something hoping that it can be usefull for you. When updating from 11.010 to 12.04 (what include updating Libre office I supose), I can't any more work with any document that was originally made in Libre office. Every change freezes the screen, I can't save anything... I'm talking of complex documents, with lots of internal references and footnotes and some propor text styles of about 230 pages (phd work) I wanted to alert you that probabely something is wrong but as I don't have any tecnical knowledge, I don't know what could be usefull to help you in your great job of making good free software. My little desktop has 2Gb of Ram memory and an atom processor (I can look for more details if that would be usefull to you)