Originally Posted by
jg70124
...However, I do have to share Excel 2003 files with colleagues, and more importantly, clients. In my world (small/mid-size manufacturing), clients all use PCs - only once in 10 years have I encountered a Mac at a customer site...
Excel 2003 files from Windows are totally compatible with Excel 2004 files from Macintosh. They go back and forth freely, with no changes required in either direction, no loss of data or formatting, etc., etc. If you and your clients upgrade to newer versions of Office, the same is true of Excel 2007 (Windows) and Excel 2008 (Mac). So, if you want to switch, this requirement is not even a small obstacle. If only one of you upgrade, 2007/2008 software can read and write 2003/2004 files. It can even be set to make 2003/2004 its default file saving format. This is also true whether Mac or Windows is running the newer version.