This is the one I recalled:
Which is what was fixed (a tad to much) after all the research Mithral did on the weird gem spawner behaviour. As documented here:
We have been asking for more tweaking (as mentioned) in that thread as well as in others, just never really heard anything official on it, nor is the spawner team I mentioned any more playable now (after 2 weeks). So to me it looks like nothing happened after Alpheon’s fix (in regards to gem spawners).
So let’s hope I just interpreted Salty’s statement wrongly then