Looks like encryption has been enabled on a larger scale...
I can't receive text or media messages from any of my contacts either.
Is there a quick workaround to force plain-text? I don't have time to test things out myself.
whatsapp-purple, Chat-Api and yowsup have implemented encryption.
Would be nice to see it here too
(And no, I currently don't have the time OR knowledge to implement it myself
)