Hi Grant, sorry for the delay. We have found the best solution for IE9,8 issues with the slider. WE change the effect of the slider to "fadeout", in this way, it looks better and without issues: demos.hellothemes.com/hellomix
To do this, go to: /skin/frontend/default/hellomix/js/custom.js
Find this fx: 'scrollLeft', and change it to: fx: 'fadeout',
Please omit the \ before the quotes, since it is an issue in text editor here in the forum. Sorry.