Problem with printing graphs to Adobe

I have been saving graphs in excel as a pdf (Adobe) file for 2 years without
an issue. In the last few months, when saving to Adobe the graphs do not
"fit" on the page. They look fine in print preview, but are too large (off
the page) when the Adobe file opens. The print range is correct, and print
preview is perfect. I have to instead "print" the single page to Adobe.
While this is work-around "works", this graph is part of an Excel workbook
with many worksheets, and I want to save all the sheets as a group to one pdf
file as I always have. Instead I have to "save" all of the other worksheets
to pdf, then "print" the one worksheet to Adobe, then insert it into the pdf
file. How do I get the graph to properly save as an Adobe file again?
--
energymonkey10