I am having the same problem. Office 2007 is newly installed. My problem is only with some excel files on my linux suse 10 server. some open fine. Others the computer hangs for a little bit, then comes back with the error can not open file (not much help). But if I copy the file from the server to my desktop I can open the file fine. I am totally confused because it is not all excel files from the server but only some. Any help would be greatly appreciated.. Maybe a fix from Microsoft???

I know nothing about Linux, but I would start with the premise that M$ does not like Linux

Once a file is put into a M$ environment, then things work fine

I would, therefore, "Google" for Linux solutions before I went to M$

I long ago learned going outside of M$ Operating System can create extra problems

I would make the same observation if I used Apple products; to wit, I would be leery of non-Apple products with a Windows basis--for example, Office for Apple would be fine, because this Office version would be written for an Apple OS

Mixing OS's is one road I care not to travel down

My problems are with some excel files and excel files only. Word and anything else created in 2003 is fine. I believe it is Linux that is causing the problem, but I don't know why it is only some excel files and not all?
I would never mixed os's either. That is the way this network was set up here when I came and it does cause nothing but headaches. I am hoping to get some things changed but in the mean time I have to try to figure this out.