Okay well your avatars are handled in VB3 so we dont support there product. I would check and make sure you have everything turned on and there usergroup can do avatars
In Photopost 4.8.6 we only show avatars for
vb users by database not file. Photopost 5.0 has an enhanced avatar thing
so unless 5.0 is gold you can edit your vb3.php file in your forums directory in photopost and find this line
$userprofile[6] = "<img src=\"{$Globals['vbulletin']}/image.php?u=$cuserid\" border=\"0\">"; // Avatar
just change it to this
$userprofile[6] = ""; // Avatar