I use minimum value bidding system, using open bidding (highest bid always shown to raid).

If the highest bidder now cancels (which he can do at any time at the moment as cancellation can not be deactivated), the raid is NOT informed about the new highest bid (which is now lower than before).
See also issue #149 .

This is important to fix since it makes open bidding basically unusable with this addon, since people can fake a high amount and retract it at the last second to pressure people into bidding high (and I think retracting does not even trigger the anti-snipe delay!).

Push!
Me and my guild would also highly appreciate that. Either having the option to disable "cancel bid" and/or posting the current highest bit after somebody cancelled it.
For now we are happy with the "broadcast bids" option, which shows all bids in your bidding-window. So it's everyones own responsility to check what the highest bid currently is. But i don't consider it player-proof.
Anyways thanks for your great addon. Keep it up!