Ok, I have a file, I created using calc. On this computer.
When I try to open it I get a general input/output error, which allows me to do nothing except close without opening. If I move my external hard drive to my mom's computer (using the same version and build of Open Office, but Windows 7), it opens just fine. I even tried saving a new copy (of the same file) and it also has the same error.
I've been using calc and OoO since v1.x.x and I love it for its versatility, but this has me stumped.