. Fixed bug #70213 (Unserialize context shared on double class lookup).
(Taoguang Chen)
. Fixed bug #73154 (serialize object with __sleep function crash). (Nikita)
+ . Fixed bug #70490 (get_browser function is very slow). (Nikita)
+ . Fixed bug #73265 (Loading browscap.ini at startup causes high memory usage).
+ (Nikita)
- Zlib:
. Fixed bug #73373 (deflate_add does not verify that output was not truncated).