Slow response WSOD recorded

Issue Summary

When voting, the vote appears to hang for a long time before registering. When checking the syslog, I found the below:

Jun 30 20:50:28 ag64a drupal: http://www.sample.com
|1246413028
|wsod
|1.3.0.4
|http://www.sample.com/drupalit/count-vote/1319/1
|http://www.sample.com/frontpage
|0
|
|menu_execute_active_handler(): returned NULL - it's very bad!
WSOD detected!

Checking for problems...

ERROR: menu_execute_active_handler() returned empty value!
Validating theme hooks...
Validation theme hooks completed.
Checking drupalit_count_vote() page callback...
ERROR: Callback: drupalit_count_vote() returned empty content!
NOTICE: router_item = Array (
[path] => drupalit/count-vote
[load_functions] =>
[to_arg_functions] =>
[access_callback] => user_access
[access_arguments] => a:1:{i:0;s:13:'vote drupalit';}
[page_callback] => drupalit_count_vote
[page_arguments] => Array (
[0] => 1319
[1] => 1 )
[fit] => 3
[number_parts] => 2
[tab_parent] =>
[tab_root] => drupalit/count-vote
[title] =

I changed the domain and IP