Updated builds.

build/three.js

@@ -26315,9 +26315,12 @@
 				values = this.values,
 				stride = this.getValueSize(),
 
-				writeIndex = 1;
+				smoothInterpolation = this.getInterpolation() === InterpolateSmooth,
 
-			for( var i = 1, n = times.length - 1; i <= n; ++ i ) {
+				writeIndex = 1,
+				lastIndex = times.length - 1;
+
+			for( var i = 1; i < lastIndex; ++ i ) {
 
 				var keep = false;
 
@@ -26328,24 +26331,29 @@
 
 				if ( time !== timeNext && ( i !== 1 || time !== time[ 0 ] ) ) {
 
-					// remove unnecessary keyframes same as their neighbors
-					var offset = i * stride,
-						offsetP = offset - stride,
-						offsetN = offset + stride;
+					if ( ! smoothInterpolation ) {
 
-					for ( var j = 0; j !== stride; ++ j ) {
+						// remove unnecessary keyframes same as their neighbors
 
-						var value = values[ offset + j ];
+						var offset = i * stride,
+							offsetP = offset - stride,
+							offsetN = offset + stride;
 
-						if ( value !== values[ offsetP + j ] ||
-								value !== values[ offsetN + j ] ) {
+						for ( var j = 0; j !== stride; ++ j ) {
 
-							keep = true;
-							break;
+							var value = values[ offset + j ];
+
+							if ( value !== values[ offsetP + j ] ||
+									value !== values[ offsetN + j ] ) {
+
+								keep = true;
+								break;
+
+							}
 
 						}
 
-					}
+					} else keep = true;
 
 				}
 
@@ -26360,13 +26368,10 @@
 						var readOffset = i * stride,
 							writeOffset = writeIndex * stride;
 
-						for ( var j = 0; j !== stride; ++ j ) {
+						for ( var j = 0; j !== stride; ++ j )
 
 							values[ writeOffset + j ] = values[ readOffset + j ];
 
-						}
-
-
 					}
 
 					++ writeIndex;
@@ -26375,6 +26380,15 @@
 
 			}
 
+			// flush last keyframe (compaction looks ahead)
+
+			times[ writeIndex ++ ] = times[ lastIndex ];
+
+			for ( var readOffset = lastIndex * stride, j = 0; j !== stride; ++ j )
+
+				values[ writeOffset + j ] = values[ readOffset + j ];
+
+
 			if ( writeIndex !== times.length ) {
 
 				this.times = exports.AnimationUtils.arraySlice( times, 0, writeIndex );