Description:
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IE7 problem with ob_start('ob_gzhandler');

Reproduce code:
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$name = 'test.sql.gz';
header("Pragma: no-cache");
header("Content-Type: application/x-gzip; name=\"$name\"");
header("Content-disposition: attachment; filename=$name");

ob_start('ob_gzhandler');
echo "test";

Expected result:
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a good gzip file it works on every browser except IE7