I found a bug in LibreOffice 4.3.0 about saving a presentation.
Open Impress and Writer simultaneously. Then type some words in Writer and copy them into an Impress textbox. Then the presentation can’t be saved. A dialog about error saving document appears instead.
I am using LibreOffice in WinXP SP3, with administrator privilege.
I did some searching and found a similar bug, but I couldn’t find any solution.