JuK is one of the few KDE programs that relies on C++ libraries other than Qt and KDE. These libraries include MusicBrainz and libOggFLAC among others, and we seem to get users every so often (especially Gentoo users sadly. I use Gentoo myself, so I know their pain =D) that have managed to install two different standard C++ libraries, so that JuK uses the new ones but JuK’s C++ library dependencies use the old one.
Because this happens so often, I’ve made a Perl script to tell you what libraries JuK depends on that use an incompatible libstdc++, which is an attachment to bug 85889.
Also, I’ve made a new release of abakus, which I won’t comment further on since I know people reading Planet KDE must be tired of hearing about calculators by now.