I’m using Jomsocial 3.0.5.3 and Joomla 3.2.0. for the Music State template - and the Profile Pro extension to customize layouts for each Jomsocial profile types.
I’ve encountered an error 1064 on user’s profile view, and the debug displays this :
" Notice: Use of undefined constant DS - assumed 'DS' in /***masked*** /plugins/system/plg_gkextmenu/plg_gkextmenu.php on line 44 "
Of course, I've first asked for the Joomduck support. They said this :
" It seems like this error is not related to Profile Pro. Do you have any SEF component installed ? This error can also be related to gkextmenu module, try disabling it. "
So I've tried to disable SEF function and gkextmenu plugin (GK Menu Extended Parameters), but nothing changed...

Note1 : there's no problem with normal mode of Jomsocial profile view (without Profile Pro)
Note2 : the profile pro extension works perfectly (with the same version of Joomla/Jomsocial) on another website using another template (Msocial)... it seems that the issue only occurs on this template.
Do you have any idea please ?
Thank you