So far i have only found one mentioning of the same problem here http://en.libreofficeforum.org/node/12674 When i try to install 5.1 (either clean install or upgrade from 5.0) it doesn’t show content of the document and menus are not show, though i can press on the empty spot and the menu will show up. When i open a menu (say Options), i can click on the various menus (the Title changes), but it always shows the same thing. Looks like some problem with video redrawing. Maybe it is related to video drivers (using ~2 years old nVidia driver as newer ones were crashing my PC, works fine for many games and all other applications), or maybe some VC++ libraries as i have many of them installed (play video games, so they come bundled).
Win7 Pro 64-bit