x/blog: incorrect blog rendering on Linux Firefox

[mewmew]

What steps will reproduce the problem?
1. Run godoc locally.
2. Use Firefox on Linux and browse to the blog.
3. Some letters are cut.

What is the expected output?
All text should be visible.

What do you see instead?
Some text is cut.

Which compiler are you using (5g, 6g, 8g, gccgo)?
6g

Which operating system are you using?
Linux

Which version are you using?  (run 'go version')
go version devel +f4d1cb8d9a91 Thu Sep 19 22:34:33 2013 +1000 linux/amd64
go.tools rev: changeset:   344:0467cd19dcd4

Please provide any additional information below.
I've attached a screenshot. Notice that the "F" in "From" is cut.

Attachments:

1. firefox-godoc.png (66666 bytes)

[adg]

Comment 1:

This looks like a bug in the Firefox rendering engine. The code box is constructed with
HTML/CSS like this:
  <div style="background: gray; padding: 10px">
    <pre style="padding: 0; margin: 0; overflow: auto">
      text
    </pre>
  </div>
The problem is with the pre with a zero padding and zero margin with overflow. I can see
it on a Linux machine I have access to (albeit with a less pronounced effect that in
your screenshot) but am unable to reproduce it on OS X.

Attachments:

1. Screen Shot 2013-09-20 at 9.42.19 AM.png (308646 bytes)

[rsc]

Comment 2:

Labels changed: added priority-later, removed priority-triage.

Owner changed to @adg.

Status changed to Accepted.

[rsc]

Comment 3:

Labels changed: added go1.3maybe.

[rsc]

Comment 4:

Labels changed: added release-none, removed go1.3maybe.

[adg]

Comment 5:

Labels changed: added repo-playground.

[adg]

Comment 6:

Labels changed: added repo-tools, removed repo-playground.