Copy something and error will popup indefinitely about uniconvertor

Binary package hint: inkscape

If I open Inkscape, draw a circle then click somewhere else on the drawing, an almost endless loop of error popups appear with this error:

UniConvertor failed:

No plugin-type information in /usr/lib/pymodules/python2.7/uniconvertor/app/plugins/Filters/__init__.py
No plugin-type information in /usr/lib/pymodules/python2.7/uniconvertor/app/plugins/Filters/__init__.py
Cannot load plugin module sk1saver
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/uniconvertor/app/plugins/plugins.py", line 73, in load_module
    desc)
  File "/usr/lib/pymodules/python2.7/uniconvertor/app/plugins/Filters/sk1saver.py", line 249, in <module>
    from app.Graphics.image import CMYK_IMAGE
ImportError: cannot import name CMYK_IMAGE
When importing plugin sk1saver
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/uniconvertor/app/plugins/plugins.py", line 190, in __call__
    module = self.load_module()
  File "/usr/lib/pymodules/python2.7/uniconvertor/app/plugins/plugins.py", line 73, in load_module
    desc)
  File "/usr/lib/pymodules/python2.7/uniconvertor/app/plugins/Filters/sk1saver.py", line 249, in <module>
    from app.Graphics.image import CMYK_IMAGE
ImportError: cannot import name CMYK_IMAGE
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/pymodules/python2.7/uniconvertor/__init__.py", line 88, in uniconv
    saver(doc, output_file)
  File "/usr/lib/pymodules/python2.7/uniconvertor/app/plugins/plugins.py", line 194, in __call__
    % {'name':self.module_name})
app.events.skexceptions.SketchError: Cannot load filter sk1saver

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: inkscape 0.48.1-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: fglrx
Architecture: i386
Date: Wed May 25 10:16:57 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=es_PE:en
 PATH=(custom, user)
 LANG=es_PE.UTF-8
 SHELL=/bin/bash
SourcePackage: inkscape
UpgradeStatus: No upgrade log present (probably fresh install)