handle != TypeHandle::none() error in recent cvs version

Hi,
I just got the newest code from the cvs and tried to build it with makepanda. I am on Ubuntu 12.10 64 Bit. During the end of the installation process, some error messages appeared:

[  0%] Copying file built/models/misc/Dirlight.egg
[  2%] Copying file built/models/misc/Pointlight.egg
[  5%] Copying file built/models/misc/Spotlight.egg
[  8%] Converting built/models/misc/camera.egg
Assertion failed: handle != TypeHandle::none() at line 152 of panda/src/putil/factoryBase.cxx

Reading dmodels/src/misc/camera.flt
Writing built/models/misc/camera.egg

[ 11%] Converting built/models/misc/fade.egg
Assertion failed: handle != TypeHandle::none() at line 152 of panda/src/putil/factoryBase.cxx

Reading dmodels/src/misc/fade.flt
Writing built/models/misc/fade.egg

[ 14%] Converting built/models/misc/fade_sphere.egg
Assertion failed: handle != TypeHandle::none() at line 152 of panda/src/putil/factoryBase.cxx

Reading dmodels/src/misc/fade_sphere.flt
Writing built/models/misc/fade_sphere.egg

[ 17%] Converting built/models/misc/gridBack.egg
Assertion failed: handle != TypeHandle::none() at line 152 of panda/src/putil/factoryBase.cxx

Reading dmodels/src/misc/gridBack.flt
Writing built/models/misc/gridBack.egg

[ 20%] Converting built/models/misc/iris.egg
Assertion failed: handle != TypeHandle::none() at line 152 of panda/src/putil/factoryBase.cxx

Reading dmodels/src/misc/iris.flt
Unable to read attribute file ../maps/soft_iris.rgb.attr
Writing built/models/misc/iris.egg

(...)

The same happened afterwards when trying to execute simple python code that used to work with earlier versions of panda:

 
python test.py 
Assertion failed: handle != TypeHandle::none() at line 152 of panda/src/putil/factoryBase.cxx
Assertion failed: _ref_count == 0 || _ref_count == local_ref_count at line 129 of built/include/referenceCount.I
Traceback (most recent call last):
  File "test.py", line 24, in <module>
    world = BulletWorld()
AssertionError: handle != TypeHandle::none() at line 152 of panda/src/putil/factoryBase.cxx

Did someone experience this before or has at least an idea, what to do?
Thanks for your help!

Best
Timo

That may have been my fault. Try latest CVS.

The error vanished!
Thanks for the prompt help, rdb!