intertwingly

Test case

• Displays properly in Opera 9.02 when served as application/xhtml+xml
• Displays properly in IE when served as text/html
• Displays properly in Firefox 1.5.0.7 when served as text/html
• Omits trailing closing bracket in innerHTML on Firefox 1.5.0.7 when served as application/xhtml+xml

Adding more brackets to the tail end of the string results in the last two being removed.  Adding a space at the end makes the brackets show up.