It acts exactly like (and is mapped to) the arrow keys. If you use a bluetooth keyboard, it will do the same; also, that behavior is largely constrained to the web browser; in other places, they behave more normal.

There's at least 3 options.

First, you can leave the config alone, and scroll by holding the d-pad down in whichever direction. (Perhaps you didn't know about that?)

Second, you can make some config changes so that arrow keys are not used for navigating; I don't know of a way to make shift+arrows still do s-nav, though, so you lose that ability entirely.* There's also stuff in that thread for making them page down, not scroll down, if you like that.

Third, you can use a greasemonkey script to put page-down buttons over top of everything; preserving snav.


*While looking for those links, I got curious and looked over here; looks like instead of disabling snav, you can set snav.keyCode.modifier = SHIFT... I have an N800, so without a shift key, I can't really try it, but you might give it a shot. Some reports indicated that some settings didn't stick, i.e. microb resets them on startup; but that was an old version, and it may be better now.