[Webkit-unassigned] [Bug 95236] New: Chrome not calculating height correctly when padding is in ems.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=95236

           Summary: Chrome not calculating height correctly when padding
                    is in ems.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.8
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: philip at philipwalton.com


My understanding is that Google Chrome recently introduced subpixel rendering. Since then I've noticed a few errors in the tabs of my site when using em values.

Here's an example:
http://jsfiddle.net/uU4q3/

The padding of the <a> elements uses ems, and even though the values are set to 5 decimal places, they still don't seem to be the same as their pixel equivalents. If you uncomment the line where padding is declared in pixels, you'll see the difference.

The error here is that the <a> elements are overflowing the <ul> element, which shouldn't be the case since the <ul> should be getting its height from the <a> element's height.

I'm seeing this issue in the current version of Google Chrome and also in Chrome Canary. I'm NOT seeing this in Safari 6. I haven't tested in WebKit nightly since it's not available on OS X 10.8.

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