help Copy from excel and pasting as a metafile in powerpoint

[Juiceapple]

All of a sudden, when I copy a range of cells from Excel 2007 and paste as a
metafile into Powerpoint 2007, the excel gridlines are also copied. This
never happened prior to a few days ago. I know I can hide the grid lines in
excel but that is inconvenient and I want to know why the sudden change and
if there is a way to correct it. I do know that an office update was
installed four days ago,.which may just be a coincidence