I’ve read, and heard, that if you leave your pointer (whatever you call that thing) on a link or button, even without clicking, it can slow down your computer. Or cause other problems. Is this true? Why?
I know it can cause you to use way too many commas. 
Peace,
mangeorge
Well, I suppose if there were a JavaScript “onMouseOver” event defined for a link, it could slow down your computer by running while the mouse was over it by running a script. But this wouldn’t be a permanent slowdown, unless the script had a memory leak, and even then, it would just take a reboot to fix. But really, you could define such an event for any part of a webpage, so the fact that it’s a link doesn’t matter.
Also, this doesn’t apply for every link, just the rare few that would have an onMouseOver defined. And, by the same token, the link could slow your computer down when you went off of it by using an “onMouseOff” (I think) event to trigger the script when you took the pointer off of it.
IOW, I wouldn’t worry about it.
Some of the icons can be made to wink, like the trash can, on various Desktop Themes.
If you want to see if it’s true, what you can do is start the System Monitor accessory, making it Always On Top and charting the cpu availability.
I suppose even a mouseover could cause a slowdown if it branches off into a longer or more complex bit of code, maybe there’s even a slowdown due to the event handler detecting that the pointer is over a clickable object (not sure about this one)