*sigh*
Thing is, if you haven´t noticed, some apps that are in extras have also devel version. So it´s quite likely that when person enables devel/testing and does repo-update (I´m taking about persons who do not understand squat about what they are doing) they notice that they have n+1 updates coming to apps that they already have. I would not be surprised that if after that person manages to update their safe extras apps to devel version and fundamentally do not really understand what just happened even thought they only installed one app from devel.

Devel has of course safe apps but IMO devel is generally for people who really understand what it means. We have already too much people reporting here weird behavior and I would not be surprised that it´s because of some devel&testing apps that leak memory over long period of time.