I am receiving an .xls file from our library hosting company. When I open the file, I get a message "The file you are trying to pen "filename.xls" is in a different format than specified by the file extension. The file may be corrupt, do you want to opent he file... I click yes and the file opens, but there is no content. The only content is the title to the worksheet. Everything else is blank. I have contact support for the Library software company and they indicate it is a problem on our end with Excel. But, I am stuck. Interestingly enough, when they changed their report and used Times New Roman as the font, I could open the file without an error. They indicated that it is an issue with Tahoma and Ariel fonts. But, I cannot find any workarounds.