Is there any known problem with compatibility between libreoffice calc and openoffice calc?
I have an openoffice calc file (written with version 3.0) I can not open with libreoffice 3.6.2 but I can still open with openoffice 3.4.1.
Sometimes such problems may occur. Please report a bug https://bugs.freedesktop.org/enter_bug.cgi?product=LibreOffice with detailed description, LibO and OS versions, example files and screenshots (if available) and specify “regression from OOO 3.0, still could be opened with AOO 3.4.1”