Installed 5.1.0 When Open Just see the menu, rest is blank

My system is Win7 Pro 64 Bit. Always used LibreOffice up to 5.0.4 and never had a problem.
Today I installed the new 5.1.0 (tried both 64 and 32 bit) and when I open it I just see the menu bar on top. The rest is totally blank. If I do open a document directly from a folder the document opens but I can’t see anything, but if I change something on it and try to close L.O. I’m asked to save it.

Any clue?

thks

Alex

Same problem here! Have you found out anything?

Probably the OpenGL bug. See my very full response in Q64314.