rdiff-backup won't install

Binary package hint: rdiff-backup

admin@doppelbock:/storage$ sudo apt-get install rdiff-backup
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  rdiff-backup
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
Need to get 0B/173kB of archives.
After unpacking 680kB of additional disk space will be used.
Selecting previously deselected package rdiff-backup.
(Reading database ... 99835 files and directories currently installed.)
Unpacking rdiff-backup (from .../rdiff-backup_1.1.5-1_i386.deb) ...
Setting up rdiff-backup (1.1.5-1) ...
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/NamedNodeMap.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/NodeFilter.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/NodeIterator.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/NodeList.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/Notation.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/ProcessingInstruction.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/Range.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/Text.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/TreeWalker.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/__init__.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/domreg.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/expatbuilder.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/dom/ext/Dom2Sax.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/xpath/ParsedNodeTest.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/xpath/ParsedPredicateList.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/xpath/ParsedRelativeLocationPath.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/xpath/ParsedStep.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/xpath/Set.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/xpath/Util.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/xpath/XPathGrammar.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
Compiling /usr/lib/python2.4/site-packages/_xmlplus/xpath/XPathParser.py ...
Sorry: TypeError: ('compile() expected string without null bytes',)
dpkg: error processing rdiff-backup (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 rdiff-backup
E: Sub-process /usr/bin/dpkg returned an error code (1)
admin@doppelbock:/storage$