diff --git a/direct/src/distributed/DistributedSmoothNodeBase.py b/direct/src/distributed/DistributedSmoothNodeBase.py
index 47dfbf8b4e..faeda49115 100755
--- a/direct/src/distributed/DistributedSmoothNodeBase.py
+++ b/direct/src/distributed/DistributedSmoothNodeBase.py
@@ -3,6 +3,7 @@
 from ClockDelta import *
 from direct.task import Task
 from direct.showbase.PythonUtil import randFloat, Enum
+from panda3d.direct import CDistributedSmoothNodeBase
 
 class DummyTaskClass:
     def setDelay(self, blah):
diff --git a/panda/src/display/frameBufferProperties.cxx b/panda/src/display/frameBufferProperties.cxx
index 06b7330535..01928f75b7 100644
--- a/panda/src/display/frameBufferProperties.cxx
+++ b/panda/src/display/frameBufferProperties.cxx
@@ -720,7 +720,7 @@ setup_color_texture(Texture *tex) const {
     {  1,  1,  1,  1,  0, false, Texture::F_rgb },
     {  1,  1,  1,  1,  1, false, Texture::F_rgba },
     { 24,  8,  8,  8,  0, false, Texture::F_rgb8 },
-    { 24,  8,  8,  8,  8, false, Texture::F_rgba8 },
+    { 32,  8,  8,  8,  8, false, Texture::F_rgba8 },
     { 16, 16,  0,  0,  0,  true, Texture::F_r16 },
     { 32, 16, 16,  0,  0,  true, Texture::F_rg16 },
     { 32, 11, 11, 10,  0,  true, Texture::F_r11_g11_b10 },
diff --git a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
index 67e60fc1ef..8b19191028 100644
--- a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
+++ b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
@@ -11099,9 +11099,13 @@ apply_sampler(GLuint unit, const SamplerState &sampler, CLP(TextureContext) *gtc
     }
   }
 
-  if (sampler.uses_mipmaps() && !gtc->_uses_mipmaps) {
+  if (sampler.uses_mipmaps() && !gtc->_uses_mipmaps && !gl_ignore_mipmaps) {
     // The texture wasn't created with mipmaps, but we are trying
     // to sample it with mipmaps.  We will need to reload it.
+    GLCAT.info()
+      << "reloading texture " << gtc->get_texture()->get_name()
+      << " with mipmaps\n";
+
     apply_texture(gtc);
     gtc->mark_needs_reload();
     bool okflag = upload_texture(gtc, false, true);
diff --git a/panda/src/gobj/texture.cxx b/panda/src/gobj/texture.cxx
index 580b521241..c0ae51c523 100644
--- a/panda/src/gobj/texture.cxx
+++ b/panda/src/gobj/texture.cxx
@@ -510,15 +510,15 @@ estimate_texture_memory() const {
   case Texture::F_luminance_alpha:
   case Texture::F_luminance_alphamask:
   case Texture::F_sluminance_alpha:
+  case Texture::F_rgba4:
+  case Texture::F_rgb5:
+  case Texture::F_rgba5:
     bpp = 2;
     break;
 
   case Texture::F_rgba:
-  case Texture::F_rgba4:
   case Texture::F_rgbm:
   case Texture::F_rgb:
-  case Texture::F_rgb5:
-  case Texture::F_rgba5:
   case Texture::F_srgb:
     // Most of the above formats have only 3 bytes, but they are most likely to
     // get padded by the driver
diff --git a/panda/src/pgraph/pandaNode.cxx b/panda/src/pgraph/pandaNode.cxx
index d4c683f7ad..e7bd9d80c7 100644
--- a/panda/src/pgraph/pandaNode.cxx
+++ b/panda/src/pgraph/pandaNode.cxx
@@ -4465,6 +4465,9 @@ complete_pointers(TypedWritable **p_list, BamReader *manager) {
   set_fancy_bit(FB_effects, !_effects->is_empty());
   set_fancy_bit(FB_tag, !_tag_data.empty());
 
+  // Mark the bounds stale.
+  ++_next_update;
+
   return pi;
 }
 
diff --git a/panda/src/putil/bamReader.cxx b/panda/src/putil/bamReader.cxx
index 9ae84b5deb..21fa7dfa74 100644
--- a/panda/src/putil/bamReader.cxx
+++ b/panda/src/putil/bamReader.cxx
@@ -142,6 +142,12 @@ init() {
     _file_stdfloat_double = scan.get_bool();
   }
 
+  if (scan.get_current_index() > header.get_length()) {
+    bam_cat.error()
+      << "Bam header is too short.\n";
+    return false;
+  }
+
   return true;
 }
 
@@ -1238,6 +1244,12 @@ p_read_object() {
 
   int object_id = read_object_id(scan);
 
+  if (scan.get_current_index() > dg.get_length()) {
+    bam_cat.error()
+      << "Found truncated datagram in bam stream\n";
+    return 0;
+  }
+
   // There are two cases (not counting the special _remove_flag case,
   // above).  Either this is a new object definition, or this is a
   // reference to an object that was previously defined.
@@ -1279,6 +1291,12 @@ p_read_object() {
       created_obj._ptr->fillin(scan, this);
       _now_creating = was_creating;
 
+      if (scan.get_remaining_size() > 0) {
+        bam_cat.warning()
+          << "Skipping " << scan.get_remaining_size() << " remaining bytes "
+          << "in datagram containing type " << type << "\n";
+      }
+
     } else {
       // We are receiving a new object.  Now we can call the factory
       // to create the object.
@@ -1379,6 +1397,13 @@ p_read_object() {
         }
       }
     }
+
+    // Sanity check that we read the expected number of bytes.
+    if (scan.get_current_index() > dg.get_length()) {
+      bam_cat.error()
+        << "End of datagram reached while reading bam object "
+        << type << ": " << (void *)created_obj._ptr << "\n";
+    }
   }
 
   return object_id;
diff --git a/panda/src/putil/bamReader.h b/panda/src/putil/bamReader.h
index 60dd47a3dc..dba9a1170b 100644
--- a/panda/src/putil/bamReader.h
+++ b/panda/src/putil/bamReader.h
@@ -144,8 +144,8 @@ PUBLISHED:
   INLINE const LoaderOptions &get_loader_options() const;
   INLINE void set_loader_options(const LoaderOptions &options);
 
-  TypedWritable *read_object();
-  bool read_object(TypedWritable *&ptr, ReferenceCount *&ref_ptr);
+  BLOCKING TypedWritable *read_object();
+  BLOCKING bool read_object(TypedWritable *&ptr, ReferenceCount *&ref_ptr);
 
   INLINE bool is_eof() const;
   bool resolve();