Problems updating from 2.9.4 to 2.10.4b20

I just tried to install latest ZMS and get the following error on
trying to access / upgrade contents to the new version:

Traceback (innermost last):
  Module ZPublisher.Publish, line 119, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 42, in call_object
  Module App.special_dtml, line 65, in __call__
  Module DocumentTemplate.DT_String, line 476, in __call__
  Module App.special_dtml, line 65, in __call__
  Module DocumentTemplate.DT_String, line 476, in __call__
  Module App.special_dtml, line 65, in __call__
  Module DocumentTemplate.DT_String, line 476, in __call__
  Module DocumentTemplate.DT_Util, line 196, in eval
   - __traceback_info__: REQUEST
  Module <string>, line 0, in ?
  Module Products.zms.zms, line 842, in updateVersion
  Module Products.zms.zms, line 278, in recurse_updateVersionPatch
  Module Products.zms._confmanager, line 89, in initCSS
NameError: global name 'REQUEST' is not defined

As I digged into the code the mentioned method initCSS uses REQUEST,
although it is not declared as parameter.

ZMS: ZMS 2.9.4-07 (Build #125f)
ZOPE: (Zope 2.10.4-final, python 2.4.2, linux2)
PYTHON: 2.4.2 (#1, Oct 10 2005, 06:55:43) [GCC 3.3.1 (SuSE Linux)]
System Platform: linux2
System Time: 2008/03/02 17:54:11.711 GMT+1
Running For: 3 hours 57 min 20 sec
ZODB Location: /opt/Zope-2.10/instance/var/Data.fs
Database Size: 175.6M

Also trying to initialize a new ZMS instance with template
myZMStheme32 causes:

Site Error

An error was encountered while publishing this resource.

Error Type: AttributeError
Error Value: myZMStheme32

Am I getting something wrong or is the some slight bugs in the current
release?

Regards, Ollie