Nothing jumping out to me

Server1 OS: Linux 2.6.32-358.18.1.el6.x86_64
Server2 OS: Linux 3.2.0-2-amd64

Both have the same settings for PHP sessions (other then default session.save_path)
Code:
Session Support 	enabled
Registered save handlers 	files user mm
Registered serializer handlers 	php php_binary wddx

Directive	Local Value	Master Value
session.auto_start	Off	Off
session.cache_expire	180	180
session.cache_limiter	nocache	nocache
session.cookie_domain	.mystore.com	no value
session.cookie_httponly	On	Off
session.cookie_lifetime	0	0
session.cookie_path	/myadmin	/
session.cookie_secure	Off	Off
session.entropy_file	/dev/urandom	/dev/urandom
session.entropy_length	32	32
session.gc_divisor	2	1000
session.gc_maxlifetime	900	1440
session.gc_probability	1	0
session.hash_bits_per_character	5	5
session.hash_function	0	0
session.name	zenAdminID	PHPSESSID
session.referer_check	no value	no value
session.save_handler	user	files
session.save_path	/home/user/cache	/tmp
session.serialize_handler	php	php
session.upload_progress.cleanup	On	On
session.upload_progress.enabled	On	On
session.upload_progress.freq	1%	1%
session.upload_progress.min_freq	1	1
session.upload_progress.name	PHP_SESSION_UPLOAD_PROGRESS	PHP_SESSION_UPLOAD_PROGRESS
session.upload_progress.prefix	upload_progress_	upload_progress_
session.use_cookies	On	On
session.use_only_cookies	On	On
session.use_trans_sid	0	0