[Zzed]

That line is generated by the following statement:

PHP Code:

$getstars=$DB_site->query_first("SELECT starlevel,starimg FROM stars WHERE minposts<=$bbuserinfo[posts]+1 ORDER BY minposts DESC LIMIT 1"); 


I don't understand why $bbuserinfo[posts]+1 turns itself into a null string to cause that MySQL error.

I would suggest maybe putting a pair of parenthesis around the addition statement.

PHP Code:

$getstars=$DB_site->query_first("SELECT starlevel,starimg FROM stars WHERE minposts<=($bbuserinfo[posts]+1) ORDER BY minposts DESC LIMIT 1"); 


And if that doesn't help, try and add 2 echo statements before the query and lets find out what happens the old fashioned way.

PHP Code:

echo "$bbuserinfo[posts] <br>";
echo "($bbuserinfo[posts]+1) <br>";