I think the most recent update introduced a bug in the mining quests.
Previously, I only got 1 message per asteroid that I targeted. Now I seem to be getting ~1/sec for as long as I am in range. This is quite annoying because it fills half of my screen with green, obscuring my next potential target.
This has happened on two (of 2) of the mining quests I have done so far. The first one seemed to stop after I jumped to a new sector, it did not stop on the second one.

daroomba, this is related to the targetless plugin. It is not a game bug. Just change the list view to something other than roid list when you have a prospecting mission.

Ah, and of course I was trying to use targetless to more quickly identify the roids I scanned in a previous mission for a different mineral. Oh well, nice idea.