And if you think this is weird, you should read this (Spanish): Adan Chávez, candidate for the officiadom in Barinas state, is also declarying people are getting a different thing in their paper trail than what they voted for electronically.
For those who don't know the basics:
Hugo Chávez was born in Barinas (a state in the Llanos, the Venezuelan pampas). His dad is the current governor of Barinas. As he has been governor for 8 years and that is the maximum allowed so far, the Chávez family decided to have Hugo's big brother, Adan Chávez, running for that state.
Now, Hugo's brother has little chances of winning there as the whole family has become notorious for their corruption in Barinas.
So both the opposition and Chavismo are saying the machines are not working properly.