. Added full caching support and ArrayAccess to CachingIterator.
. Added array functions to ArrayObject/ArrayIterator and made them faster.
. Added support for reading csv and skipping empty lines in SplFileObject.
+ . Added CachingIterator::TOSTRING_USE_INNER, calls inner iterator __toString.
- Added run-time configurable backtracking/recursion limits for PCRE. (Andrei)
- Added preg_last_error(). (Andrei)
- Added support for Apache 2.2 handler in the Windows distro. (Edin)