Creative Assembly releases 1.5 (R:TW) and 1.6 (Barb invasion)patch, which fixes and upgrades both Rome: Total War 1.3 and Barbarian Invasion expansion.
1.5 patch upgrades the non-Barbarian Invasion expansion owners, while 1.6 updates Barb. Invasion.
Read the readme and find the download link here:
http://www.twcenter.net/forums/showthread.php?t=39185