How to reproduce the problem: - Open new file in Calc - Enter "ab" in field A1 - Mark A1 and push button "Conditional Formatting: Condition" - Cell value is equal to "ab" - Apply style: New Style... - Background: Select color, e.g.: Green - OK - Field A1 should now be green - File - Save As... - Enter name and pick filter: Microsoft Excel 2007-2013 XML (.xlsx) - Save - Close LibreOffice - Open file in LibreOffice: the background of A1 is not green anymore
*** This bug has been marked as a duplicate of bug 99866 ***