diff --git a/libs/gui/SurfaceTexture.cpp b/libs/gui/SurfaceTexture.cpp
index 3c0d475..0561909 100644
--- a/libs/gui/SurfaceTexture.cpp
+++ b/libs/gui/SurfaceTexture.cpp
@@ -437,6 +437,11 @@
             mSlots[buf].mEglImage = EGL_NO_IMAGE_KHR;
             mSlots[buf].mEglDisplay = EGL_NO_DISPLAY;
         }
+        if (mCurrentTexture == buf) {
+            // The current texture no longer references the buffer in this slot
+            // since we just allocated a new buffer.
+            mCurrentTexture = INVALID_BUFFER_SLOT;
+        }
         returnFlags |= ISurfaceTexture::BUFFER_NEEDS_REALLOCATION;
     }
     ST_LOGV("dequeueBuffer: returning slot=%d buf=%p flags=%#x", buf,
diff --git a/opengl/libs/EGL/egl_cache.cpp b/opengl/libs/EGL/egl_cache.cpp
index 13a4929..fe32d43 100644
--- a/opengl/libs/EGL/egl_cache.cpp
+++ b/opengl/libs/EGL/egl_cache.cpp
@@ -85,7 +85,7 @@
             bool atStart = !strncmp(BC_EXT_STR " ", exts, bcExtLen+1);
             bool atEnd = (bcExtLen+1) < extsLen &&
                     !strcmp(" " BC_EXT_STR, exts + extsLen - (bcExtLen+1));
-            bool inMiddle = strstr(" " BC_EXT_STR " ", exts);
+            bool inMiddle = strstr(exts, " " BC_EXT_STR " ");
             if (equal || atStart || atEnd || inMiddle) {
                 PFNEGLSETBLOBCACHEFUNCSANDROIDPROC eglSetBlobCacheFuncsANDROID;
                 eglSetBlobCacheFuncsANDROID =
diff --git a/opengl/libs/EGL/egl_display.cpp b/opengl/libs/EGL/egl_display.cpp
index 862b48d..31119f9 100644
--- a/opengl/libs/EGL/egl_display.cpp
+++ b/opengl/libs/EGL/egl_display.cpp
@@ -220,15 +220,19 @@
         if (end) {
             // length of the extension string
             const size_t len = end - start;
-            // NOTE: we could avoid the copy if we had strnstr.
-            const String8 ext(start, len);
-            // now go through all implementations and look for this extension
-            for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
-                // if we find it, add this extension string to our list
-                // (and don't forget the space)
-                const char* match = strstr(disp[i].queryString.extensions, ext.string());
-                if (match && (match[len] == ' ' || match[len] == 0)) {
-                    mExtensionString.append(start, len+1);
+            if (len) {
+                // NOTE: we could avoid the copy if we had strnstr.
+                const String8 ext(start, len);
+                // now go through all implementations and look for this extension
+                for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
+                    if (disp[i].queryString.extensions) {
+                        // if we find it, add this extension string to our list
+                        // (and don't forget the space)
+                        const char* match = strstr(disp[i].queryString.extensions, ext.string());
+                        if (match && (match[len] == ' ' || match[len] == 0)) {
+                            mExtensionString.append(start, len+1);
+                        }
+                    }
                 }
             }
             // process the next extension string, and skip the space.
diff --git a/opengl/tools/glgen/stubs/gles11/GLES11ExtHeader.java-if b/opengl/tools/glgen/stubs/gles11/GLES11ExtHeader.java-if
index c5e34cd..0c5fa04 100644
--- a/opengl/tools/glgen/stubs/gles11/GLES11ExtHeader.java-if
+++ b/opengl/tools/glgen/stubs/gles11/GLES11ExtHeader.java-if
@@ -124,6 +124,10 @@
     public static final int GL_TEXTURE_MAX_ANISOTROPY_EXT                           = 0x84FE;
     public static final int GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT                       = 0x84FF;
     public static final int GL_BGRA                                                 = 0x80E1;
+    public static final int GL_TEXTURE_EXTERNAL_OES                                 = 0x8D65;
+    public static final int GL_SAMPLER_EXTERNAL_OES                                 = 0x8D66;
+    public static final int GL_TEXTURE_BINDING_EXTERNAL_OES                         = 0x8D67;
+    public static final int GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES                     = 0x8D68;
 
     native private static void _nativeClassInit();
     static {
@@ -135,4 +139,4 @@
     private static final int GL_FLOAT = GLES10.GL_FLOAT;
     private static final int GL_SHORT = GLES10.GL_SHORT;
     
-    private static Buffer _matrixIndexPointerOES;
\ No newline at end of file
+    private static Buffer _matrixIndexPointerOES;