Hello!
I was surprised when trying to delete a large amount of keys (more than 200): I had to repeat "Repare" three times ! At each atempt, only a part of my selected keys desappeared. The remaining others survived selected and I was obliged to repeat "Repair". This problem did not exist in version 1.8.0.455. MR:-)
(Vista 32 Premium, 2Go Ram, dual channel)