I have a couple spreadsheets with lots of charts in which for which the plot areas unaccountably shrink. They'll be smaller when I open the spreadsheet than they were when I saved it. Or will gradually get smaller as I work on other parts of the spreadsheet. Does anyone have similar experience -- or a fix? I'm using Excel 2007 with Windows XP. The charts are mostly scatterplots, some mixed, line/bar plots.