Affects Version/s: 1.7
Fix Version/s: None
1. Click "Find Contacts" from Dashboard
2. Leave all fields blank and click "Search"
3. You'll see an unrecoverable error "Could not find valid Key" right away.
I did a trace... it seems to be related to session.
When I clicked "Search", it goes to an intermediate CiviCRM handler which then redirects to the result page via header().
In the result page, the session handler seems to set $_SESSION['CiviCRM'] to NULL right after session_start().
Thus, CiviCRM could not find the old key associated with the user/controller and tries to create a new one. This causes a mismatch with the key embedded in the search form.
I inserted an error_log to print out the session variable in session_read() [includes/session.inc], it seems to read the session correctly (i.e., $_SESSION['CiviCRM'] is not empty).
My platform is Solaris 10, Apache 2.2.4, php 5.2.1
My session config is (They are all default):
session.save_handler = files
;session.save_path = "/tmp"
session.use_cookies = 1
; session.use_only_cookies = 1
session.name = PHPSESSID
session.auto_start = 0
session.cookie_lifetime = 0
session.cookie_path = /
session.serialize_handler = php
session.gc_probability = 1
session.gc_divisor = 1000
session.gc_maxlifetime = 1440
session.bug_compat_42 = 0
session.bug_compat_warn = 1
session.entropy_length = 0
;session.entropy_length = 16
;session.entropy_file = /dev/urandom
session.cache_limiter = nocache
session.cache_expire = 180
session.use_trans_sid = 0
session.hash_function = 0
session.hash_bits_per_character = 5