On two Win7 Pro x64 SP1 PCs, Excel 2010 could not save a new file to a
location on our NW60 server. The error we received was "[Filename]
cannot be accessed. The file may be corrupted, located on a server that
is not responding, or read-only."

Oddly, Word 2010 was able to save new files. LibreOffice 5 could not
save Writer or Calc documents, but OpenOffice could save both.

Files already on the server could be opened without errors. New files
saved locally could be copied to the server, then could be saved after
editing, but new files could not be placed on the server through the

On both PCs, I rolled back to Client 2 SP3 IR10b, and the errors went
away. Since few of our PCs are at SP4, I don't expect more distress
calls, but I wanted to report this problem.