Subject: Why aren't Quantum Mechanics and Einstein's relativity compatable?

I understand Einstein's theory.  It's quantum mechanics that I don't fully 
understand. It seems that in the Quantum mechanics model the space time fabric 
is unstable and we have electrons 'teleporting' , whereas in Einstein's theory 
of relativity, the space time fabric is natrualy still, until there is mass on 
it which will result in a "dent" which causes gravity.
[you asked for further explaination of my understanding of quantum mechanics, 
and citations: I would say wikipedia 
 but that is known to 
be unreliable.  What sparked my intresest in this is a video on nova about 
string theory  I was skeptical of its explaination of the other 
Mechanics because of the videos obvious bias to string theory, which led me to 
question you.  If the video is wrong in its explaination of either Mechanics 
or event the string theory, then how so.

Re: Why aren't Quantum Mechanics and Einstein's relativity compatable?