Why most domains drop their PR in the auction phase of NameJet?

[Fking]

Why for the most domains with PR the moment they go from pre-order to auction phase and PR drops to 0.
I just had 3 domains that on pre-order were PR5 and now when the auction is running they are PR0?
There haven't been any google PR updates around that time.

Do they regain their PR later?
Are they dropped at any moment, or just renewed to another owner?

 

[xtmoney]

check pagerank domains for their backlinks..
if it's pr5 then check domain if have at least 1 pr6 backlink

 

[Fking]

they have lots of links, but the rule about at least one PR6 is a bit generalised :>