JQuery :: Animate With ScrollTop Does Not Work In IE

I am migrating a site from prototype/scriptaculous to jQuery, and I am encountering a lot of problems with animations in IE. I should start by asking that in scriptaculous, none of these animations require special CSS or tricks for IE (like getting rid of position absolute or anything like that), but this seems to be the case for almost every animation I do in jQuery - is there a list somewhere of all the little hacks and tricks people need to do to get these animations to work in IE? I have re-implemented a few hundred of these animations (mostly crossfades, sliding up and down, highlights), and not a single one worked in IE with the original CSS from the scriptaculous version (in most cases, the other browsers would). In most cases this has to do with absolute positioning. Is it possible jQuery 1.4.4 (the version I am working with) just has massive problems or something because my impression was this library was supposed to be easier to work with, not inordinately more difficult... I just find it hard to believe everyone else is having this many issues with it.

In any event, one thing I can't find any fix for anywhere, is animating the scrollTop of an element (NOT the whole page, which seems to be what everyone else wants to do). I have a div with overflow:hidden, and two buttons underneath which allow the user to scroll through the div (a real scrollbar in this context would not look good or be very useful in comparison).

I ported the code over from scriptaculous, and it works just fine in all normal browsers. Here is the version that would animate scrolling up:

Tested in Firefox/Chrome/Safari just fine right off the bat. But in IE, it just waits and then calls my callback, setting the scrollTop correctly at the end but not actually animating. It's not totally failing, in the sense that the scrolling does happen, and the callback does fire, but it should animate, and I don't really see any reason why it wouldn't. I have set position on the div and all wrapping divs to relative, and static, and set the display value, set the zoom value, widths, heights, everything, but this div will not animate as it scrolls at all in IE only (this is all IE's - 6, 7, and 8). I also tried isolating the div on its own page, removing nearly all the content (leaving text so it will have something to scroll through), practically no CSS outside of width, height, and overflow, and again - does not work in IE only (works in all other browsers without fail).