Description:
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This code (See below) leaves the image empty, without returning any kind of error. I've verified that it really remains empty several times. The intresting thing is that if I replace imagecreatetruecolor with imagecreate it works.

Configure-line:
'./configure' '--with-apxs2=/usr/local/apache/bin/apxs' '--with-xsl' '--with-gd' '--with-pspell' '--with-ttf' '--with-zlib' '--with-jpeg-dir=/usr/lib' '--enable-sockets' '--enable-ftp' '--with-mysql=/usr/local/mysql40/' '--enable-exif'

No gd-related changes to php.ini.

Reproduce code:
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list($ll['x'],$ll['y'],$lr['x'],$lr['y'],$ur['x'],$ur['y'],$ul['x'],$ul['y']) = imagettfbbox(10,0,FONT,$text);
//echo abs($lr['x'])+abs($ur['x']),' ',abs($ur['y'])+abs($lr['y']);
$img2 = imagecreatetruecolor(abs($lr['x'])+abs($ul['x']),abs($ur['y'])+abs($lr['y']));
imagecolorallocate($img2,0,0,0);
imagettftext($img2,10,0,$ul['x'],8,imagecolorallocate($img2,255,0,0),FONT,$text);
imagepng($img2,'foo.png');
imagedestroy($img2);

Expected result:
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The text outputted on the image canvas.

Actual result:
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A blank image.