TrueCrypt Website Says To Switch To BitLocker
Found on Slashdot on Wednesday, 28 May 2014

Several readers sent word that the website for TrueCrypt, the popular disk encryption system, says that development has ended, and Windows users should switch to BitLocker.
A source code diff of the two versions has been posted, and the new release appears to simply remove much of what the software was designed to do. It also warns users away from relying on it for security.
Sounds pretty much like a defacement. Although someone bothered to put a little more work into it that usual. Just sit back, stick to your currently installed version and wait a few days; until then things should have cleared up some.