We don't face this problem in SP1.
When we have a matrix and want to freeze some row-groups(columns), it does so. But when we drag the horizontal scroll bar of IE, the alignment of the row is completely screwed up. The text in the columns which are set to float, either shifts up or down. I guess this has to do with the wraping of the text in the row group cells. This is a great irritant and is stopping us from moving to SP2.
Please let me know if this has been fixed or there is a workaround.
Thanks