• IE interprets pre + p as p.

• Skyfire treats p[class] as p. (Or it thinks every paragraph has a class).

• NF & Blackberry doesn’t support images for before and after.

The :hover pseudo-class really only makes sense when a mouse cursor is present, as it is on S60v3.

:active supported by: Vodafone WM, Opera 8.65 SE, S60v3 WebKit, Iris (only while touching the screen), Ozone.

• NF/SE: links only, hover only
• Something happens on Skyfire, but it’s not even close to correct.

• The first time you add a paragraph at the start, WebKit/NokE66 gives the next paragraph (i.e. the previous first-child) the :last-child styles in addition to the :first-child ones.
• NF/SEK770i can’t do dynamic test because of link focusing problems.
• S60 WebKit has a last-child bug that may impact first-child.

• Op/Mot supports, but only visible very briefly when exiting edit mode.
• Op/SE applies styles, but removing them is sometimes an issue. Besides, it’s not entirely clear when the SE thinks the user has focused on the form field.
• NF/Samsung applies styles after user has left form field, and then they’re permanent.
• NF/SE applies styles after user left form field editor and keeps them until user focuses somewhere else. That’s odd, but correct on the SE OS.
• Safari iPhone doesn’t put the focus on the field. Once you’ve clicked on the field (and it has gotten the correct :focus styles) you have to click it again, or your typed text won’t appear. This is caused by the width change.

• WebKit adds an extra 'T' when you do the dynamic test.
• Opera (except Mini) leaves out the 'T' of the second and subsequent sentences when you do the dynamic test.

• Opera/HTC doesn’t react to the Back and Forward buttons: the element doesn’t apply or remove the pseudo-class at all.
• Back and Forward buttons are untestable in Opera VFWM; but I assume the bug exists in that browser, too.
• Opera Mini, Bolt, and Ozone: works with direct link on this page, but not when you use the link on the test page.

• Nokia 5800: Does not work on radio buttons.
• Blackberry applies the checked styles only when you disable the form fields.
• You can’t disable form fields in Bolt.
• Can’t do the :checked test in Iris because I can’t check checkboxes or radios.
• Impossible to distinguish between checkboxes and radios in Ozone.

• Safari iPhone correctly removes the :empty styles when content is added but does not re-apply them when the content is removed.

• S60v3 WebKit applies last-child style to first-child.
• Blackberry updates last-child information only when it has to update first-child information. So last-child by itself is static.

• Bolt gets the screen size wrong, but media queries work correctly with this wrong value.

• Opera SE P1i supports position: fixed vertically, but not horizontally.
• Opera Mini doesn’t execute the test script.

• Opera HTC shows scrollbars when necessary, but these scrollbars aren’t usable.
• Opera SE P1i does not support overflow: visible and hidden: block is sized to height of content.
• NetFront SE K770i and Opera Mini don’t execute the test script.
• The Nokia 5800 scrollbars are hard to use.
• Ozone treats overflow: scroll as overflow: auto.

Compatibility depends only on the values block, inline, none, inline-block, list-item, and the table values.

• As usual, WebKit needs elements with display: table and table-row to show elements with table-cell correctly. Exception: Iris and G2 (RETEST G1).
• IE Mobile supports display: table and friends and needs the same as WebKit. It does not support display: inline-block.
• NetFront SE K770i: no inline-block, table.
• NetFront SE K770i and Samsung F700 Treats run-in and compact as inline.
• Skyfire doesn’t support inline-block

Compatibility depends on circle, decimal, decimal-leading-zero, disc, lower-alpha, lower-greek, lower-latin, lower-roman, none, square, upper-alpha, upper-latin and upper-roman.

• S60v3 WebKit: no decimal-leading-zero,
• NetFront SE C510: no lower-greek,
• IE: no decimal-leading-zero, disc, lower-greek, lower-latin, square, upper-latin
• NF Samsung F700: no lower-greek
• Opera Mini: circle as box
• Bolt: circle as box, disc as square, no lower-greek, bug in list-style-position: inside

• Opera HTC in desktop mode, Opera Mini and Bolt do not support max-height by itself, although they do in combination with max-width.
• Opera SE P1i, NF SE K770i, do not support max-height at all.

On several WebKits (among others G2 and Ozone) the box model itself seems to be implemented wrongly or buggily. Retesting is necessary.

• The G2 may have a buggy implementation of box-sizing (in portrait mode only). Retesting necessary, but something is hideously wrong here.

• Opera HTC doesn’t show the element with opacity at all (i.e. applies opacity: 0).
• Iris makes the opaque box grey.

• Opera HTC supports text-shadow, but the colours and radius are way off.
• Opera Mini and Iris don’t support radius.