Index: modules/quercus/src/com/caucho/quercus/env/LargeStringBuilderValue.java
===================================================================
--- modules/quercus/src/com/caucho/quercus/env/LargeStringBuilderValue.java	(revision 3304)
+++ modules/quercus/src/com/caucho/quercus/env/LargeStringBuilderValue.java	(working copy)
@@ -475,12 +475,8 @@
    */
   public final StringValue append(byte []buf, int offset, int length)
   {
-    int stringOffset = _length % SIZE;
-    int stringEnd = _length + length;
+    ensureCapacity(_length + length);
 
-    if (SIZE < stringOffset + length)
-      ensureCapacity(_length + length);
-
     while (length > 0) {
       int chunk = _length / SIZE;
       int chunkOffset = _length % SIZE;