"previous page" button doesn't work
Most of the time (but not always) while browsing the web in safari on an imac, the "Previous page" button goes dim and I can't return to the previous page.
iMac (27-inch Mid 2010), Mac OS X (10.7.5)
Usually when that happens, the 'next page' button darkens. And you can then go backwards and forwards !!!
If you press cmd + left hand bracket (next to p) that takes you to the previous page. Similarly if you press cmd + right hand bracket, you go to the next page.
