Some more questions (faces)

While am playing away, some more questions now on the face thinggy.

1.
I spent some blood, sweat and tears in installing opencv and  
facedetect, but i think i have it now (at least, it shows up ok in the  
test.php). But i can't see the magic :-(
Can someone explain what "Find faces" and "Find similar" are supposed  
to do? And/or maybe show me where i can look for errors?
Find faces only gives me the faces i manually tagged and find similar  
only gives a 30ish% similarity between different persons, while i have  
a lot of other photo's with the same person on which i expected to  
show up too ... is there any tuning to be done?

2.
I also tagged some faces manually, but if i give them the same name  
they still show as "different" faces in the "People in this gallery"  
window. Is this how it works? Shouldn't they be grouped or something?

3.
And then a bit off topic, on horde.org you have a nice pic of the  
galleries shown like a "random bunch of photo's" from the gallery  
itself ... how do you do that? Does it come with a style?

Cheers,
J

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