*I have submitted this by email too, but wanted to add it here in case anyone else is having the same issue*
I recently upgraded my Mac to the latest version of Chrome (14.0.835.186) which adopts the new scroll bar behaviour introduced to OSX with Lion. This makes it impossible to open the RTM task list because the small triangle that you need to click on is, in effect, underneath the scroller.
A short term fix is to change OSX's default behaviour to 'Always' show scrollbars; but I'd rather use the new setting which is 'Automatically based on input device'.
Posted at 4:56pm on September 30, 2011