The human readable version:
You will not hold me or any contributors responsible for anything that happens while you are using this program. No matter what.
If you send a direct message to your violently jealous girlfriend explaining where you were last night, she never gets it, and savagely kicks you between the legs the next time she sees you, I won't foot the hospital bill (though I would understand if you needed a drink - call me up).
If you upload pictures to Twitpic of that wild party last weekend - the one where you made out with 3 strangers and the pizza delivery guy, and they instead end up in your grandparents's "our angelic granddaughter" Facebook album, I won't come with you to explain or apologize (unless your grandma bakes nice pies - mmm, pie).
If the program somehow causes the end of the world in 2012… well, then you won't be around to blame me anyway, will you?
The annoying CAPS version:
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.