When things are working properly, I hover my mouse over a link and it changes from an arrow to a hand with a finger pointing, and I can click the link and it will work. But often, I'll hover over a link and the mouse pointer doesn't change, and I can't get a click from the link.
Usually if I reload the page with the icon at the top of the browser (or with F5), the link becomes clickable.

This has to be a very basic problem, but I haven't been able to come up with a solution.

-Joe-