Fake AP in the Vendor field of Netstumbler

[<shankarnarayan.d () netsol co in>]

Hi,

  Was working on the Vulnerability Assessment of a client network with about 100 Access Points. Began with Netstumbler 
and it started showing me some AP's as Fake in the Vendor field. I know that they are Cisco AP's, but am not too sure 
why they are displayed as Fake AP's

I googled around a little but did not get any satisfactory answers - one on Netstumbler.org said it was a quirk in the 
version 0.4.0. Others suggested that I delete the Fake entry and retry - this also did not lead me anywhere

Anyone 'stumbled' on some other explanations

Rgds,
Shankar