I've been seeing some very inconsistent behavior when I try to use my mouse scroll wheel to look through the catalog (left) panel. When in grid mode scrolling does not work unless the pointer is hovered right over the elevator channel - but not always - the elevator has to be highlighted. If it is over the catalogs it won't scroll. In loop mode hovering anywhere over the catalog panel will scroll. In develop mode the scroll works fine over the presets panel.
I found a few posts about this going back to Lr3. Some people indicated that other programs cause the issue. Seems doubtful. At any rate the issue has been around a while.
Is there a definitive fix so that the mouse will always scroll the left panel?