Description:
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php version 5.5.8 memcache 3.0.8 pre-compiled dlls
couchbase latest

Seems like because of entroduced locking of sessions, when users opens several urls on the server simultaneously (e.g. with the middle mouse button) the resulting pages open with non-readed session (user is not authorized).
problem is solved by using memcached-2.2.7.


Test script:
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  ini_set('session.save_handler','memcache');
  ini_set('session.save_path','localhost:11211');