ok,
well i did the following hack which might help a few people
also, i'm pretty much a beginner, so if the code is ugly or inefficient, i'm sorry but it works for me :D
on line 2469 in the sources/functions.php file (in IPB) i replaced the following lines:
$url =$ibforums->base_url.$url;
with
$findme = 'www.domain.com';
if (!is_int(strpos($url,$findme)))
{
$url =$ibforums->base_url.$url;
}
else{
}
where www.domain.com is your domain.
this will redirect the user back to where he/she was in the gallery when login in using the IPB integration.
I did not yet do the logout hack for this, but it should work the same way.
Hope this helps