I have no clue about the technical aspects of this problem, but on the zagat.com signon page(https://www.zagat.com/account/signin.aspx?HID=signin_top_left_ns&SignInKey=HeaderSignInLink&RURL=http://www.zagat.com/index.aspx), the text is very badly misrendered to the point where it is unreadable.
Confirmed with r31853. Regression from Safari 3.1.
Created attachment 20513 [details]
This reduction renders the same in Safari 3.1 and IE7 (which AFAIK is the only other browser to support the CSS zoom property), ToT is the only one borked.
Interesting. What does zoom:0 mean in IE? I don't know what that means. We could just ignore it...
(In reply to comment #4)
> Interesting. What does zoom:0 mean in IE? I don't know what that means. We
> could just ignore it...
I'm not sure. There was a comment above that rule on the site alluded to something being disabled ("/*Sign In Wrapper (disabled)*/").
I guess I'll just fix zoom:0 so that it's ignored. It seems to be a hack to get elements to "have layout" in IE.
Fixed in r31915.