xls & xlsx open blank - how to fix?
When I try to open an xls or xlsx spreadsheet in Numbers on my iMac, there is no content, just an empty document. I can see the content in the preview pane in Finder though, and I can open the same spreadsheets on my wife's iMac (10.6). Do you know why this is happening and how I can solve the problem?
iMac, OS X Mountain Lion (10.8.4), Numbers '09 v2.3