Scouts detect within the old range but use the new range for the mines they detect, so the mine they target at the edge of their range does not become detected causing them sit there requireing manual movement and detection.

Scouts will/did attack the mines though.  Hell, they still do half the time.  But I noticed that they do sometimes stall out now, when near the new detection range.  The ability to reveal the mines doesn't seem to always trigger correctly at the new maximum range. 

Heavy Cruisers stalling out sometimes?  Or a different bug?

Honestly you've been going on about this since the patch came out. If its not something exploitable just tell us, though if its not as amusing as the Kol asteroid cannon I'm going to be quite disappointed.