Has anyone experienced this? We have excel files on a SMB mounted network location that I used to modify all the time. But since upgrading to 10.6, I am unable to save the file either with the same name or different name. In fact I cannot save any file at all in the network location. I can still copy/move the file, if I first save it locally. I can save files from iWork (well Word can save, but only as 'read only'), in the same location. This affects both Excel 2004 and 2008. To complicate it further, I can save files to a different SMB location, without any issue! You might say it is some access permissions issue, but why then it won't affect Pages or Numbers too?