New version brought back Everquest problems

I updated to the latest build this morning, and immediately experienced the problem with the mouse jumping to other windows. I'm not sure how to explain it. When I hold down the left mouse button and scroll left and right, it should scroll the camera (in 3rd person mode). With the latest update, it will only scroll a little bit each direction and then lock in that window. It's like the mouse has moved to another window.

When I revert to the prior build, scrolling this way with the left mouse button down is silky smooth.

It's not a huge deal, as I'm fine with the prior version - but I wanted to let you know.