First - let's make this clear: This is POSITIVELY NOT A "CARET BROWSING" problem. Hitting F7 enables it, and the problem persists, hitting F7 to disable CB, and it's still FUBAR. As the title says, the PageUp / PageDown keys don't always work to scroll Up and Down within a page. When they aren't doing that function, they work to do Back/Forward browsing (alt-left/alt-right) respectively. This seems to occur randomly, but very frequently. Within a single browsing session it can switch back and forth between the two. Obviously, I can't always pinpoint when it switches. Though (and it could be observer bias) I notice that sometimes certain pages seem to enable it (scrolling, that is), possibly Wikipedia and Google Image search. I've tried "Safe Mode"(all plugins & extensions disabled), with no change in results. Any suggestions are welcome - this is killing me - it makes my touchpad/mouse and keyboard method of two handed browsing difficult. I've also (more than a few times - including while writing this) lost many a content form (textarea) while attempting to srcoll on it, I instead browse "Back", losing all the contents. Thanks in advance, Mark