March Madness also describes the 10-Mar Microsoft security updates.
Of Stuxnet fame, there is a new fix for the LNK vulnerability in MS15-020.
It turns out the initial fix had a bug. A malicious LNK file with a link path of exactly 257 characters containing embedded unescaped spaces, and two "target" files - one with embedded unescaped spaces and one without can still execute code.
As obscure as it sounds, it's now public knowledge. Happy patching!
Technical report on HP ZDI provides the details.