Beta15 started to mark edits as minor. This should be turned off ASAP, as IABot’s edits often require manual postprocessing: e.g. fixing links marked as dead, removing/adjusting archived ones, not to mention sorting out and reporting bugs (yes, IABot still has numerous bugs).
I would like to second this request. The bot flag is sufficient if users want to filter out IABot's edits. The minor flag should be reserved for cosmetic changes and simple find-and-replace tasks.