Comment 15 for bug 707931

Same issue in quantal (tab char was fixed in translation, but special ctrl char still wrong).
I have attached a (very simple) patch, for potential maintainer(s). Please apply these changes, if you think they are appropriate.

Moreover, should someone want to patch texinfo file by him/herself, please do as following:
download file texinfo.po for your release from lauchpad, e.g. for Ubuntu 12.10 http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/quantal/language-pack-it-base/quantal/download/head:/texinfo.po-20110119120642-tdoej8x3jpu7ms0l-2/texinfo.po

download attached texinfo_it.patch in the same directory...

patch the texinfo.po:
$ patch < texinfo_it.patch

compile it:
$ msgfmt -o texinfo.mo texinfo.po

finally install the mo file:
$ sudo install -m 644 texinfo.mo /usr/share/locale-langpack/it/LC_MESSAGES/texinfo.mo

...and update info:
$ sudo update-info-dir

Hope it might be useful, in some way.