All the Portuguese speaking countries (Portugal, Brazil, Angola, Mozambique, East Timor, Cape Verde, Guinea-Bissau, and São Tomé and Principe) have recently decided to standardise their spelling, based on the Brazilian standard. The main impact will be to remove silent letters from the standard spelling in Portugal.
For example, this will turn óptimo (great) into ótimo and acção (action) into ação. The new rules on hyphens and accents change auto–estrada (highway) to autoestrada. Ideia and sinónimo will become idéia and sinônimo too, since the accent rules are different in Portugal too.