The CSS specification does not indicate how browsers should display text when the font-size is set to a value of zero (font-size: 0;). What this means is that many browsers handle it unpredictably.
- Mozilla and Netscape 7: doesn't display the text
- IE for Mac and Safari: the text is displayed at the default size as if there were no font-size property
- Opera: the text is small, but still legible
- IE for Windows: displays the font at an illegible size, but still visible
If you are trying to hide text on a page, you should instead use the display: none; property. This will insure that it disappears no matter which browser you're using.
