diff -r 04c2b8b41385 -r b0dcc1e3397c extensions/updater/extension.cpp
--- a/extensions/updater/extension.cpp	Sat Feb 28 23:15:23 2009 -0500
+++ b/extensions/updater/extension.cpp	Sun Mar 01 01:18:09 2009 -0500
@@ -153,7 +153,7 @@
 		else
 		{
 			smutils->BuildPath(Path_SM, path, sizeof(path), "gamedata/%s", part->file);
-			FILE *fp = fopen(path, "wt");
+			FILE *fp = fopen(path, "wb");
 			if (fp == NULL)
 			{
 				AddUpdateError("Could not open %s for writing", path);