I have owned two Kubotas. The first was a 2001 B7500 and the second is a 2005 B7510 (The reason for two of the same tractor is a long story). Anyway, on my B7500 when I would park it in the garage on the pavement, I would put the bucket down with the front of the bucket resting on the pavement. It would stay there until I used it the next time. I do exactly the same thing with my B7510 but I have noticed that the bucket over time will roll up until the actuators are all the way in. Is this indicative of a valve leak? I would think that the bucket would tend to dump instead of roll back. Has anyone had the same problem? It is still under warranty so I could get it fixed free if there is a problem. Thanks for your help.