A while ago I've notcied, then sometimes some of my objects doesn't fire the 'hover' state on the first time. Like - you have to move cursor on it, nothing happens, take it away, move on it again and hover state works normally. Couldn't find any possible reason for some time, but today I've managed to narrow it to one thing.
Like in the title - When moving cursor from disabled image with hover state, adjacent object hover state won't trigger on the first try. You can check the story file, it would be easier to understand. It happens in SL360 and SL3. That's not something you cannot overcome, but requires additional work.