I have an xls file that is around 2mb, when I do a saveas unicode in Excel 2003 it creates an 83kb file, however when I do the same in Excel 2010 I get a 31mb file. Any ideas as to why I get such a massive file in Excel 2010 and how to save it would be greatly appreciated as it is driving me nuts.

I can't attach the file i am using unfortunately as it contains customer data.

Thanks in advance,

Dave