On Windows 7, with updated Excel 2007, why is it that half the items in my combo box would work and half do not? I set up a linked picture of a chart and charts 1-5 & 10-13 work perfectly but charts 6-9 & 14-18 only show blank spaces. I have deleted & started from scratch numerous times and its always the same thing. I even downloaded a couple of examples that are purported to work fine and only half of the charts display properly on those as well. I can't tell from anything I've found or tested or downloaded if the problem is with excel itself or with what I am doing. Is there a known issue ?