I've been using this version of superkaramba (0.37_rc2) for more than 3 monthes on my amd64 machine. It didn't crash and no one filled bug reports concernnig this version. So I believe it should be marked stable now (at least for amd64 which I used it on). I am using it on kde 3.4.3
Please don't bug us with it. The package will be removed as soon as KDE 3.5.2 (and kde-base/superkaramba) goes stable.