[Xenon]

hmm, you can clear userfields from within your acp,
but ok, here's how you'd do it:

open admin/functions.php
find

PHP Code:

    // do posts from ignored users
    if (($ignore[$post[userid]] and $post[userid] != 0)) {
        eval("\$retval = \"".gettemplate("postbit_ignore")."\";");
    } else {
        eval("\$retval = \"".gettemplate("postbit")."\";");
    }
    return $retval; 


before add:

PHP Code:

if($bbuserinfo['usergroupid'] == 6) {
  $removeavalink = "<a href=\"member.php?action=removeava&userid=$post[userid]\">remove Avatar</a>";
} else {
  $removeavalink = "";
} 


then you can add $removeavalink in your postbit template.

all you have to do now is to open member.php and put after this:

PHP Code:

// ############################### start mark all forums read ###############################
if ($action=="markread") {
  $templatesused = 'redirect_markread';
  include("./global.php");
  if ($bbuserinfo[userid]!=0 and $bbuserinfo[userid]!=-1) {
    $DB_site->query("UPDATE user SET lastactivity='".time()."',lastvisit='".time()."' WHERE userid='$bbuserinfo[userid]'");
  } else {
    vbsetcookie("bblastvisit",time());
  }
  eval("standardredirect(\"".gettemplate("redirect_markread")."\",\"index.php?s=$session[sessionhash]\");");
} 


this:

PHP Code:

// ############################### remove user avatar ###############################
if ($action=="removeava") {
  include("./global.php");
if ($bbuserinfo[usergroupid]!=6) show_nopermission();  
$DB_site->query("UPDATE userfield SET field7='' WHERE userid=$userid");  
eval("standardredirect(\"Avatar removed!\",\"index.php?s=$session[sessionhash]\");");
} 


that should work