From section 15.10.2.12 CharacterClassEscape contains: The production CharacterClassEscape :: s evaluates by returning the set of characters containing the characters that are on the right-hand side of the WhiteSpace (7.2) or LineTerminator (7.3) productions. Table 2 in section 7.2 contains: \uFEFF Byte Order Mark <BOM>
This causes sputnik regressions, these are error in the test suite. Filed: http://code.google.com/p/sputniktests/issues/detail?id=34 Will just check in failing results, they fail on the last part of the test so won't mask other errors.
Committed revision 73056.