I hope that I have found the reason now why the patch has stopped to work:
Since Ubuntu Natty (10.4) the language setting is no longer only by the LANG environment variable, but now
additionally by the LC_MESSAGES, which pdftk does not overwrite yet.
So please try, if
LC_MESSAGES=C pdftk ...
or
LC_MESSAGES= pdftk ...
works.
Thanks for all testing and the helpful reports!
I hope that I have found the reason now why the patch has stopped to work:
Since Ubuntu Natty (10.4) the language setting is no longer only by the LANG environment variable, but now
additionally by the LC_MESSAGES, which pdftk does not overwrite yet.
So please try, if
LC_MESSAGES=C pdftk ...
or
LC_MESSAGES= pdftk ...
works.