The pre-installed XBMC 13.1 has problems with some add-ons. This is a problem with Android XBMC 13.1 in general and not the Q5..
There is an easy solution.
For near perfect XBMC add-on support you can install a later version of XBMC. e.g. SPMC or Kodi 14 (current latest is beta3).
http://spmc.semperpax.com/
http://kodi.tv/download/