I use [Home] [End] [Page Up] and [Page Down] keys extensively, and for the most part they work OK, but sometimes the [Home] key acts like [Page Up] and only moves up a little, or is totally unresponsive. In these cases, sometimes it works correctly after clicking on the posts area, other times it takes more than one mouse click before the keys respond right. I don't know if these Keys not responding correctly and consistently is a bug, or something that's implemented improperly or if it's something that's not implemented at all. but the result is maddening.