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Hi Douglas,
Do you face this issue with a specific Excel file?
What do you mean by insert page break is broken?
You may remove page break and insert the page break manually in Excel 2010 and check if it works fine:
You may refer to the link below to delete and create page breaks in Excel 2010:
You may also change the default printer using the link below and check if page break works fine:
http://windows.microsoft.com/is-IS/windows7/Change-your-default-printer
I hope it helps. Let us know if you need further assistance.
Thank you.