I had the same problem, did the same as Gregor, nothing worked, I then used aqbanking from lucid (version 4.1.8) and now everything works fine again.
It seems to be a problem of the aqbanking version in karmic (4.1.2), that apparently has been solved with version 4.1.6, see the comment for this version in the news tracker of aqbanking: http://www2.aquamaniac.de/sites/news/index.php (Translation: This version solves a bug in the HBCI module that prevented the saving of particular user and account information. Affected users were not able to retrieve account data) -- Online-Actions not working in GnuCash https://bugs.launchpad.net/bugs/453895 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs