Linksys WRT54GS Router - Cisco Systems Logo

This is a bit of a strange question, but here goes.

We have a Linksys WRT54GS Router here, when we first installed it the
Cisco Systems logo would light up green when powered on. Around
November last year we installed a firmware update and the logo changed
color to white (note this is the logo on the front of the physical
router - there is a light behind it iluminating the logo). Today we
installed the latest firware update and now the logo is yellow/orange.

I've googled around but I can't find anything relating to the color of
the logo and what it means, has anyone ever experienced this or have
any idea what the differing colors of the Cisco Sytems logo means?

Thanks
Mike Quigley