Im using Microsoft Office Excel 2010, with Windows 7 Professional.
in the prt-screen attached you can see something pretty weird.
Is a list of 1000 email address, with some other information, basically is an export of the address book of thunderbird.
When I save it as Excel 2010 the size is 23MB, same file saved as Excel 2003-2007 is 450KB, of course is not 23MB of file.
Can some of you give me some hint why and what's going on, and how to solve it