So, if you are using the most current Dev build of the Chrome Browser… Note that you may not be able to scroll UP the page with your mouse. Its a bug that was introduced to the this mornings update (12/10/2010). You can install the general release and all will be well again. Then flip back to the dev build once they release an update to the Dev Channel.
Update: Google pushed an update this morning to fix the scroll bug in the dev channel. (12/11/2010)