The 1.4.03 update for X³: Reunion fixes two specific problems that some people were experiencing in 1.4.02. Details of the fixes can be found in the readme file.

Note 1: Savegame compatibility is maintained from all previous publicly released versions up to 1.4.02 (including 1.4.1 BETA 1 and 2) but it is possible that certain savegames made using 1.3.02 BETA may no longer work.

Note 2: When running 1.4.03 the initial options menu will show 1.4.03 in the top-right corner, but the main in-game menu will still show 1.4.02. This is normal.