?– When this pseudo-element is applied to a positioned element that has a layout
(p. 158), and whose first character is an inline descendant, the first line box isn??™t
displayed.
?– Bizarre specificity and inheritance problems affect this pseudo-element.15
Internet Explorer versions up to and including 7, Firefox versions up to and including
2, and Opera 9 will not include punctuation immediately following the first character
in this pseudo-element.
In Opera 9.2, whitespace is counted as a letter if it??™s preceded only by punctuation.
In Internet Explorer 6, this pseudo-element fails if it??™s not immediately followed by
whitespace. This means that whitespace must appear between the pseudo-element
and the declaration block, as well as between the pseudo-element and the comma,
if the pseudo-element isn??™t the last selector in a group of selectors.
15 You can find some examples of this behavior at http://www.satzansatz.de/cssd/pseudocss.html.
Selector Reference
The Ultimate CSS Reference 110
Internet Explorer versions up to and including 6 will crash in certain situations
involving this pseudo-element and underlined links.
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