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"output handler 'ob_gzhandler' cannot be used twice&quo

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#1.    "output handler 'ob_gzhandler' cannot be used twice&quo
carcinogen
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Recently I've installed several different mods and other addons both from this site and others. The only problems I encountered were very minor ones that I fixed without much trouble. However, after sorting out a small parsing error in one of the files associated with Remote Avatar Size Control mod, I started getting the warning in the thread title, which is odd because the files it says are corrupted aren't in any way related to the mods I installed -- not even the avatar one.

This is the error I get when I try accessing anything within the Forum admin panel. The rest of the page loads and functions fine but this keeps showing up at the top of every single page:


Warning: ob_start(): output handler 'ob_gzhandler' cannot be used twice in /public_html/main/modules/Forums/admin/page_header_admin.php on line 81


The section of code in the page_header_admin.phph around line 81 is as follows:


{
        $phpver = phpversion();

        $useragent = (isset($_SERVER["HTTP_USER_AGENT"]) ) ?

$_SERVER["HTTP_USER_AGENT"] : $HTTP_USER_AGENT;

        if ( $phpver >= '4.0.4pl1' && ( strstr($useragent,'compatible') ||

strstr($useragent,'Gecko') ) )
        {
                if ( extension_loaded('zlib') )
                {
                        ob_start('ob_gzhandler');
                }
        }


Then I get this similar error whenever I load any of the publicly viewable forum pages. Again, everything seems to be working fine, just that this shows up at the top of every page:


Warning: ob_start(): output handler 'ob_gzhandler' cannot be used twice in /public_html/main/includes/page_header.php on line 96


And the section of code around line 96 of page_header.php:


{
        $phpver = phpversion();

        $useragent = (isset($_SERVER["HTTP_USER_AGENT"]) ) ?

$_SERVER["HTTP_USER_AGENT"] : $HTTP_USER_AGENT;

        if ( $phpver >= '4.0.4pl1' && ( strstr($useragent,'compatible') ||

strstr($useragent,'Gecko') ) )
        {
                if ( extension_loaded('zlib') )
                {
                        ob_start('ob_gzhandler');
                }
        }


Could somebody please help me translate this error, and suggest ways of fixing it ?
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#2.    re: "output handler 'ob_gzhandler' cannot be used twice
echo
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You can get rid of that error by going into your forums admin section > cofiguration, and disable GZip Compression in the settings.

Simple explanation: The data is already compressed by the server, so enabling it in the forums would be like trying to compress it twice.
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#3.    
carcinogen
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Ah, that explains it. Thanks ! =]

Btw, does this mean that I don't have to worry about enabling GZip Compression in the future ? (I'm not sure what exactly it does to begin with, but, just thought I'd make sure that particular setting isn't something I'll need to change at some point later on.)
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#4.    re: "output handler 'ob_gzhandler' cannot be used twice
echo
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I can't predict the future, but for now you don't need it. icon_smile.gif
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#5.    
carcinogen
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Right, thanks again !
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#6.    re: "output handler 'ob_gzhandler' cannot be used twice
cceller
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What if you are getting the error BUT you already have GZIP disabled?
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