Comment 4 for bug 418242

I don't have a tablet (and no recent experience with any) - so I can't answer your question, what a tablet (pen, driver configuration) can / should / does cause in Inkscape on Ubuntu. The possibility of a clipboard related mechanism that triggers an import or export command was already mentioned in the 'gimp_xcf.py' related bug #347987.
- Do you use the regular mouse or the pen/tablet mouse when this python error message pops up?
- Do the pen buttons have any special copy or paste functions assigned - maybe common functions like 'a tap within a text box results in pasting from the clipboard'?
- Does unplugging the tablet stop it?

the current list (rev. 22148) of extensions which in any way are related to the python uniconv(erter) module:

LeWitt:extensions suv$ grep -i uniconv *|awk '{FS=":";print $1}'|uniq
ccx_input.inx
cdr_input.inx
cdt_input.inx
cgm_input.inx
cmx_input.inx
plt_input.inx
plt_output.py
sk1_input.inx
sk1_output.py
uniconv-ext.py
uniconv_output.py
wmf_input.inx
wmf_output.py