Hi Vitaliy S.
Well, from my understanding the warning generally means the backup completed despite what ever the reason..
From a board report perspective im only really interested if the backup didn't run at all i.e Failed or perhaps was incomplete.
This way I can auto generate a report each month and just dump it in my board report.. at present like I said before.. showing the warnings makes the graph drop on certain days.. despite the backup actually completing..
See where im coming from?
It would be good also if it did show historical trends of failures/warnings.. this would be a great feature request! *hint hint*