The kde maintainer of kMathTools apparently doesn't update the sources that often, and one of the kde developers has requested it be removed. See the URL for details.
Right, we didn't notice kmathtool was not compiled by default. kdeedu-meta does not compile it by default now.
I'm being told to mark this stable? wtf :/?
Because we weren't told to mark 3.4.2 stable, it's downgrading arts and kdelibs to 3.4.1 on people's machines.
r.i.p.