Obviously it needs fixed, but am I right in saying that all can use the mouse wheel if they have it and all could use the up/down arrow (if they didn't have a mouse wheel) in the meantime?
I think this is something that we might get a quick hotfix out of SD for.
Golgoth - as no one from SD has chimed in here regarding this issue yet, you should probably move this to problem reports and add change your post's title so its more clear