Recently, while ripping some boards on my left-tilt Jet cabinet saw, I had one of the (obviously unstable) boards bend and bind the blade to the point that the blade was misshapen. After extracting the wood and putting the blade back in shape, I found the blade had somehow jumped about 5/32" to the left, causing some of my inserts, which now do not line up, to be unusable.

The alignment of the blade with the mitre slots and the fence is still good. The bearings and the arbor seem firm and there are no unusual noises or vibration. Cuts are clean.

I don't know if it's associated or not but, I did recently put on a new arbor and new bearings which involved removing the top (which is how I know the blade was aligned with the slots to start with), so I thought that, maybe, the top moved but top is held by eight bolts to the cabinet, and the extension, which would also have had to move, is held by six more.

Has anyone ever had this happen and, what could be the cause and how do I fix it ?