Header is jacked up in Firefox & Flock (Mac)

I am using ZenCart 1.3.7. The header has always displayed fine until I upgraded to Firefox 3.0.3 and now there is a thin separation showing up on top of the navigation:

I wasn't that concerned about it until today when I downloaded Flock browser and noticed it does the exact same thing. The header on the affiliates page is really jacked up.

Can anybody tell me how to fix this?

Is this a Mac browser issue or are any of you out there on a Windows machine seeing the same thing?

In Win FF3 there's a bigger line there initially and then it sorts out self out. Hmmm.

kuroi:

In Win FF3 there's a bigger line there initially and then it sorts out self out. Hmmm.
Thanks for looking. This is driving me nuts. :wacko: I don't know enough about coding to figure out the problem.

I'd also be interested in knowing how it displays in IE. Or maybe I don't even wanna know. :cry:

When I first loaded it in IE7, there was a small white line above the Home Shop About links. It's not there now, and the site looks fine in IE7 and FF2, although the RSS feed is screwed in FF, probably by NoScript.

stevesh:

When I first loaded it in IE7, there was a small white line above the Home Shop About links. It's not there now, and the site looks fine in IE7 and FF2, although the RSS feed is screwed in FF, probably by NoScript.
Interesting. Thanks.

About the RSS feed being screwed up in FF ... is it giving you some sort of error? It seems to be working fine in my FF, but obviously I haven't tested it in other browsers or platforms. I've got both the RSS and WordPress mods in effect, but the feeds were conflicting so I had to make some changes to the code. This might be the cause of the problem. Ugh. Somebody please shoot me.

It's NoScript that's messing with the RSS and the Comodo corner thing.