Mind Like Iron, the Inquisitive enhancement that should automatically search out nearby things with a -4 penalty, appears to be broken. I can have a search double digits higher than necessary to detect a trap and it will not pop out automatically.
For example, I was just in Death House on Heroic Normal on Hardcore. I have a Search of 43 and none of the traps in the basement will automatically search out. If I remove items and get my Search down to 29, if I manually search they will still pop out. So I should have at least +14 over what is needed to find the traps, but none of them will pop automatically. Secret doors seem to search automatically but traps are very erratic.