'Search' function on iPod? NEED HELP!

[blue gekko]

Okay, I've got two 30GB iPod videos (one white, one black).
The black iPod's about a year older than the white.
The white iPod has a search function, whereas the black iPod does not...
They are both synced to my Mac, which currently runs 10.3.9.
I've got iTunes 7.4.2.
As well as iPod software (1.2.1).

I don't understand why my black iPod doesn't have a search function?! Ultimately, it doesn't matter, but I'm really curious as to why this is. If you need any other information I'd be happy to give it to you.

 

[Qion]

The white iPod is 5.5G, whereas the black iPod is 5G. 5.5G was an update from the 5G iPods that included the search feature and a couple other things.

 

[blue gekko]

Ooooh thanks for the response! May I ask what other features the 5.5G has over the 5G?

 

[eric2006]

Here's an in-depth view:
http://playlistmag.com/reviews/2006/09/5gipodlate2006/index.php