Debug Modes & Queries

[Aaron1]

Thanks Xenon will try that, but i am also worried about these queries:

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Warning: Cannot add header information - headers already sent by (output started at /home/sites/site5/web/forum/global.php:145) in /home/sites/site5/web/forum/admin/functions.php on line 1700
Query: SELECT templatesetid,replacementsetid,userselect FROM style WHERE styleid='6'
Time before: 0.28320288658142
Time after: 0.28443598747253

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Query: SELECT count(*) AS posts FROM post,thread WHERE post.dateline > '1077204189' and thread.threadid=post.threadid and thread.forumid <> '16' and forumid <> '54'
Time before: 2.952183008194
Time after: 3.2847220897675
--------------------------------------------------------------

Why is there this warning: cannot add header information?

And the last querie, is for a hack to show how many posts/threads the members since their last visit. But that one is very slow too. Any way to optimize that querie?