Apparently there is a problem that Microsoft solved avoiding the copy/past cells between Excel and Access. You can import the data from the file but it’s kind of annoying if you are regular to use the copy/paste straight from the file. So the solution is to uninstall the patch. And of course, not installing it again next time it asks for. Here the solution and how to unfix the fix. http://www.fmsinc.com/MicrosoftAccess/Errors/ExcelPaste/Clipboard.html
the patch # is KB958437
update: el 2 de mayo sacaron otro patch que hace la misma mierda: KB959997
