Version: (using KDE 4.3.1) Installed from: Debian testing/unstable Packages One of buggy program (no kde ;) had eat all space in home. After freeing space and reloggin ALL user settings are gone: plasma settings, kmail accounts, you-name-it.
Fixed in 4.3.2 and 4.4. Thanks *** This bug has been marked as a duplicate of bug 206596 ***