Known bugs:
 - the parametric footprint dialog crashes with a GTK-Critical
   mitigation: do not open the parametric footprint editor dialog
   (do not double-click the parametric footprint name and do not use
   the edit icon); entering the footprint in the filter still works, 
   e.g. entering so(8) or acy(300) should produce the right footprint.

 - works only if user locale (language) is set to English or at least
   to a language that uses '.' for decimal (e.g. German uses ',');
   this will be fixed in the next release.