Hi Laszlo, thanks a lot for your bug report. I've just uploaded version 2.56 of gwyddion to Debian. Please note that I'm not a user of gwyddion nor do I have the slightest idea how to use it nor what input files I could use for testing.
Without having any input file it looks OK for me now and I did not see any error message about module load failures. It would be really great if you could check (after some hours the package might need to be available on Debian mirrors). If the problem persists please reopen the bug report. It would be also great if you could point to some example input file. It seems the problem is solved in some PPA you pointed to. If this is the case I would love to get a pointer to a *.dsc file to check the differences in the packaging. Kind regards Andreas. -- http://fam-tille.de