The log you paste is not enough, please paste full error log in Apache log file.
Hey ZhangHuangbin, tnx 4 fast reply!
Here is apache error.log from /var/log/apache2/error.log
[Thu Jun 27 12:41:19 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:41:19 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:41:20 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:41:20 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:41:20 2013] [notice] Apache/2.2.22 (Ubuntu) mod_ssl/2.2.22 OpenSSL/1.0.1c mod_wsgi/3.4 Python/2.7.3 configured -- resuming norm$
[Thu Jun 27 12:41:35 2013] [error] [client 193.77.237.43] File does not exist: /var/www/treeters.com/javascripts, referer: http://beta.treeter$
[Thu Jun 27 12:41:35 2013] [error] [client 193.77.237.43] File does not exist: /var/www/treeters.com/javascripts, referer: http://beta.treeter$
[Thu Jun 27 12:41:35 2013] [error] [client 193.77.237.43] File does not exist: /var/www/beta/favicon.ico
[Thu Jun 27 12:41:43 2013] [error] [client 193.77.237.43] File does not exist: /var/www/treeters.com/favicon.ico
[Thu Jun 27 12:44:04 2013] [notice] caught SIGTERM, shutting down
[Thu Jun 27 12:44:30 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:44:30 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:44:30 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:44:30 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:44:30 2013] [notice] Apache/2.2.22 (Ubuntu) mod_ssl/2.2.22 OpenSSL/1.0.1c mod_wsgi/3.4 Python/2.7.3 configured -- resuming norm$
[Thu Jun 27 12:50:40 2013] [notice] caught SIGTERM, shutting down
[Thu Jun 27 12:51:06 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:51:06 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:51:06 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:51:06 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:51:06 2013] [notice] Apache/2.2.22 (Ubuntu) mod_ssl/2.2.22 OpenSSL/1.0.1c mod_wsgi/3.4 Python/2.7.3 configured -- resuming norm$
[Thu Jun 27 12:51:57 2013] [notice] caught SIGTERM, shutting down
[Thu Jun 27 12:52:23 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:52:23 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:52:23 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:52:23 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:52:23 2013] [notice] Apache/2.2.22 (Ubuntu) mod_ssl/2.2.22 OpenSSL/1.0.1c mod_wsgi/3.4 Python/2.7.3 configured -- resuming norm$
[Thu Jun 27 12:53:44 2013] [notice] caught SIGTERM, shutting down
[Thu Jun 27 12:54:09 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:54:09 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:54:10 2013] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Thu Jun 27 12:54:10 2013] [warn] RSA server certificate CommonName (CN) `treeters.com' does NOT match server name!?
[Thu Jun 27 12:54:10 2013] [notice] Apache/2.2.22 (Ubuntu) mod_ssl/2.2.22 OpenSSL/1.0.1c mod_wsgi/3.4 Python/2.7.3 configured -- resuming norm$
[Thu Jun 27 12:55:13 2013] [error] [client 193.77.237.43] File does not exist: /var/www/treeters.com/favicon.ico
[Thu Jun 27 12:55:19 2013] [error] [client 193.77.237.43] File does not exist: /var/www/treeters.com/javascripts, referer: http://beta.treeter$
[Thu Jun 27 12:55:19 2013] [error] [client 193.77.237.43] File does not exist: /var/www/treeters.com/javascripts, referer: http://beta.treeter$
[Thu Jun 27 12:55:20 2013] [error] [client 193.77.237.43] File does not exist: /var/www/beta/favicon.ico
[Thu Jun 27 12:55:27 2013] [error] [client 193.77.237.43] File does not exist: /var/www/beta/favicon.ico
And this is what I get with tail -f /var/log/apache2/error.log
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9] return handle_class(cls)
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9] File "/usr/lib/python2.7/dist-packages/web/application.py", line 396, in handle_class
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9] return tocall(*args)
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9] File "/usr/share/apache2/iredadmin/controllers/mysql/basic.py", line 39, in POST
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9] auth = core.Auth()
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9] TypeError: __init__() should return None
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9]
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9] 0.0 (4): SELECT * FROM sessions WHERE session_id='48499a8deabbdd96fdad4cc86d086f1a4fe7ab38'
[Fri Jun 28 06:11:37 2013] [error] [client 89.212.180.9] 0.0 (5): UPDATE sessions SET data = 'KGRwMQpTJ3VzZXJuYW1lJwpwMgpOc1MnbGFuZycKcDMKUydlbl9VUycKcDQKc1MnaXAnCnA1ClY4\\nOS4yMTIuMTgwLjkKcDYKc1MnZW5hYmxlQW1hdmlzZExvZ2dpbmdJbnRvU1FMJwpwNwpJMDAKc1Mn\\nbG9nZ2VkJwpwOApJMDAKc1MnZW5hYmxlQW1hdmlzZFF1YXJhbnRpbmUnCnA5CkkwMApzUydzZXNz\\naW9uX2lkJwpwMTAKUyc0ODQ5OWE4ZGVhYmJkZDk2ZmRhZDRjYzg2ZDA4NmYxYTRmZTdhYjM4Jwpw\\nMTEKc1MnZW5hYmxlU2hvd1VzZWRRdW90YScKcDEyCkkwMApzUydzdG9yZVBhc3N3b3JkSW5QbGFp\\nbicKcDEzCkkwMApzUydlbmFibGVQb2xpY3lkJwpwMTQKSTAwCnNTJ2ZhaWxlZFRpbWVzJwpwMTUK\\nSTAKc1Mnd2VibWFzdGVyJwpwMTYKUyd3ZWJtYXN0ZXJAdHJlZXRlcnMuY29tJwpwMTcKcy4=\\n' WHERE session_id='48499a8deabbdd96fdad4cc86d086f1a4fe7ab38'
[Fri Jun 28 06:11:38 2013] [error] [client 89.212.180.9] File does not exist: /var/www/favicon.ico