Ok - I've gotten the emails regarding this photo - No she did not stand up by herself!! :) While she has yet to prove she is not a child prodigy - the milestone of standing up on her own appears to be a little ways off.
What has caused this "confusion" ? I believe I can solve it all this way:
Exhibit 1

This original photo is somewhat deceptive because it doesn't have a "time" stamp on it. If it did, you'd see that 1 second after this was taken, the following shot was taken. Exhibit 2

She stood on her own AFTER her Daddy 'stood/propped her up - but she was leaning over on the couch for support - it was for just a second and then she fell over.
So it actually went more like this:
 
|
Adorable