Amidst the flurry of Half-Life patches released yesterday, one file was overlooked, the update for Half-Life: Initial Encounter. This is a retail edition that included Half-Life: Day One and a stand-alone version of Team Fortress Classic, version 5.0.1.5. The patch to update it to version 5.0.1.6 can be downloaded from Sierra's ftp server (5.6 MB). Thanks to Valve's Erik Johnson for the clarification.